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湖南省隆回县万和实验学校高中物理 第一章 运动的描述复习学案 新人教版必修1


letters and calls, a nd do pra ctical thi ngs for the ma sses combi ne good, effective thr oug h reaching people at the s ervice of the "last mile". Third, foster t he devel opme nt of new e nergy, new G eneral Se cretary XI Jinping stresse d devel opme nt of innovation forest restr uct uring, revitalizati on of the ol d industrial bases i n Northeast China is the State's maj or strategy, Ce ntral has i ssue d compre hensive opini ons of revitalizing Northea st Chi na and oth er old i ndustrial bases, t he CPC Ce ntral Committee on revitalization in Nort heast China wer e ... V igorous determi nation does not waver, the work does not sla cken off. Be firm with in the development ha s more to do with hard, a nd not muddl e along, pas sive ina ction. To rely on t heir ow n efforts, ca n't wait, ca n't wait, stand still. T his not only provi des new opportunities for devel opme nt in our region, and gave us new requirements . We must s e ize the opportunit y, full use of nati onal poli cy, has to be more com pli cated, to start a nd target, give full play to t he initiative of lea ding cadres at all level s, active, a ctive, focusi ng on buildi ng new mome ntum for devel opme nt, accelerating tra nsformation of forest development. To impleme nt the new devel opme nt philosophy. Phil os ophy is the a ction guide, new i deas a nd new developments. Car rying out innovation, coor dinati on a nd development of green, open, s hared i deas , must be mea surabl e, dire ct acti on with new development concept s, training cadres. In a new devel opme nt co ncept as a yardstick. Esta blis hed i n line wit h the new concept of evaluation system and evaluation criteri on, embodies the new development poli cy, organizati on, mandate impleme ntation, always meas ured by the new development phil os ophy, conti nuous corre ction of forest transition course. I n a ne w devel opme nt conce pt for the pat h comma nd. A s part of the impl ementation of the new devel opme nt philosophy followe d and acti on g uideli nes, firmly adj usted, corre cted a nd reje ct unsuita ble, i nappropriate a nd eve n against the ne w devel opme nt ideas , be ha viors and practi ces, mor e pragmatic approa ch base d on a broa d vision, and creatively carry out ecol ogical construction, industri al devel opment , improving people's live lihood, such a s the w ork to ensure that new development ide as take root i n forest areas. I n a new devel opme nt concept for wea pon training cadre. E ducation lea ders "in t he ne w, nothi ng" two article s, enhancing vitality a nd power. Com bine d devel opme nt "six big industry", and impleme ntation "three big engi neeri ng", and create "two big e nvironme nt", strengtheni ng on new development, and ne w economy conce pt of learni ng, and grasp a nd using , real put thought and acti on unified to new development concept up, at wit h new development conce pt armed himself, and gui de pr a ctice, effective do adv ocate i nnovation, a nd focused on coor dinati on, a nd adv ocate gree n, and thi ck plant open, and advance s hared. Se cond, w e must rely on Scie nce a nd te chnol ogy affects. Te chnical i nnovation i s the pr omotion of economic transformati on a nd upgradi ng, quality and efficiency "first power".

湖南省隆回县万和实验学校高中物理必修一复习学案:第一章 运动的描述
一、质点 1.在某些情况下,可以不考虑物体的 和 ,这时,突出“物体具有质量”这一要素,把 它简化为一个 的点,称为质点。质点是一种 模型。物体能否看成质点,关键要看所研究 问题的性质, 当物体的 和 对研究的问题的影响可以 时,物体可视为质点。 2.下列运动的物体中,能看成质点的是 ( ) A.研究跳水运动员入水时减小水花的方法 B.研究 10000 米长跑时运动员的速度 C.研究火车进站时的速度和停靠位置 D.研究体操运动员的优美舞姿 二、参考系 1.描述一个物体的运动, 首先要选定某个其他物体做参考, 观察物体相对于这个“其他物体”的 是否随时间变化,以及怎样变化。这种用来做参考的物体称为参考系。 2.对同一个运动,选择不同的参考系时,观察到的结果 ,实际选取参考系的时候,需要 考虑到使运动的描述尽可能简单。研究地面上物体的运动,通常取 或者 不动的其他物 体做参考系比较方便。 3、时刻和时间——时间就是两个时刻之间的间隔;在时间轴上,时刻用点表示,时间用线段表示。第 3 秒末、第 4 秒初指同一时刻,第 3 秒内指第 3 秒初到第 3 秒末两个时刻之间的时间间隔。前 3 秒内指 0 时刻到 3 秒末这两个时刻之间的时间间隔。 【巩固练习】 1、以下的计时数据指时间的是( ) A、中国亚洲杯揭幕战 20 时开球 B、某人用 15s 跑完 100m C、早上 6 时起床 D、隆回开往长沙的汽车于 13 时 30 分在隆回出发 2、在时间轴上标出下列时间或者时刻 A、第 15 秒初 B、第 15 秒末 C、前 15 秒 D、第 15 秒内 3.在平直公路上行驶的汽车内,乘客以自己所乘的车作为参考系,向车外观察,他看到的下列现象中, 不符合事实的是 ( ) A.公路两旁的树木是不动的 B.与汽车同向行驶的自行车,车轮转动正常,但自行车向后运动 C.道路两旁的房屋是运动的 D.有一辆卡车总在自己车前不动 三、路程和位移 1.路程是表示物体实际运动轨迹的 ,只有 ,没有 ;位移是表示物体(质点)的 变化,是从 指向 的有向线段。 2.关于位移和路程,下列说法错误的是 ( ) A. 物体沿直线向某一方向运动, 通过的路程就是位移 B. 物体通过一段路程, 其位移可能为零 C. 物 体沿直线向某一方向运动,通过的路程等于位移的大小 D.物体通过的路程不等,但位移可能相同 3.气球升到离地面 80m 的高空时,从气球上脱落一物体,物体又上升了 10m 后开始下落。若取向上为 正方向,则物体从离开气球到落到地面 时的位移为 m,通过的路程为 m。 4.某人从 A 点出发向东行 6 km,再向北行 10 km,又向南行 2 km,求他全过程中运动路程是 , 位移的大小为 ,方向 。 四、速度 平均速度和瞬时速度 1.速度等于物体的位移与发生这个位移所用的时间的 ,通常用符号 表示;速度既有 又 有 ,是 。 2.平均速度:表示物体在一段时间内运动的 和方向,用公式表示为 ; 瞬时速度: 表示物体在某一 或某一位置的 和方向。 3.已知直线 AC 的中点为 B 点,物体沿 AC 做变速直线运动,在 AB 段的平均速度为 6 m/s,在 BC 段的 平均速度为 4 m/s,那么它在 AC 段的平均速度是 ( ) A.4.8 m/s B. 5.0 m/s C. 5.2 m/s D. m/s

livelihood, i s related to people's w ell-being a nd s oci al harmony and stabilit y. We need t o prote ct and im prove the liv elihood of the people as the starting point and e ndi ng poi nt of transition and improve fore st people's feeli ng and ha ppi ness . To promote poverty relief and devel opme nt work. Im pl ementing poverty alleviation cr ucial proje ct is a major strategi c de cision made by the CPC Central Committee, is also determine d by the provi ncial "first proj ect", we must unify think ing and acti on to t he requirements of the Ce ntral, provi ncial , resol utely win t he poverty battle. The previ ous pha se I to 18 stations, Tahe, Pine Ridg e research, visite d many of the poor, go, the heavier, more pres sure . For poverty relief a nd development work, we must pay attenti on to it, alway s in mind, graspi ng ha nds, shoul d not be bl indly optimisti c, ther e can be no sla ck. P overty alleviation and devel opment li es in pre cise, a ccurate. Pre sent, i n order t o find out the real base of poor people as soon as possi ble, come up with feasi ble poverty standards, state card, built on the basi s of docume nt management . To firmly establi sh the "poverty reducti on" concept, i ncreas e 强 很 、 力 响 影 ; 专 最 该 时 同 办 举 么 致 一 相 场 市 标 目 们 我 与 否 是 虑 考 要 首 于 对 。 外 次 其 , 合 综 和 览 展 业 行 名 著 性 际 的 内 国 加 参 择 选 先 优 the intensity of resource integrati on, a nd relate d funding, wit h limited funds wi sely. By using a combi nation of employme nt, entre prene urship for poverty eradicati on poverty eradi cation, educati on, poverty alleviati on, me dical ai d of poverty mea ns, due to effects of poli cies, t hos e poli cies , ens ure the com pletion of missi on obje ctives for poverty eradicati on for the yea r. To actively pr omote the construction of new towns . In Fe bruary thi s year, pr omulgated by the State Council on further promoti ng urbanizati on construction of new opinions, pr oposed t o adhere to the pe ople -centered, four moderni zations synchr onizati on, optimizati on, e col ogy civili zation and cult ural heritage of new ur bani zation path wit h Chi nes e chara cteristics. Accor ding to district -wide construction of civiliz ed city a nd the bea utiful country side, furt her strengt heni ng of ur ban transport, water supply a nd drainage and sew age, waste di sposal ground, undergr ound, s uch as infrastructure construction, strive to create a safer and more liva ble e nvironme nt. To actively se ize the full stop a nd opportunities for poverty alleviat ion and devel opme nt, further efforts to i ncreas e forest villages merge, populati on to t he County (district) Council sites a nd centres conce ntrated in vill ages and tow ns. Combi ned development of ur ban construction and touri sm industries, careful pla nni ng and constr ucti on of a number of suitabl e for reside ntial and farm tour towns and villages, f orming one village one pr oduct, a featur e pattern. Cl oser to t he masse s. Since last year, our i n-dept h impleme ntation of the leadi ng cadre s of grassroots masse s at work, s olve the problems of a large number of people, get the mass es give whole hearted s upport to a nd praise, thi s work w ill carry o n, abs olutely cannot or mov ement. Gras sroot s masses a nd cadres i n combinati on w ith poverty reduction, combined with t he steady w ork of

letters and calls, a nd do pra ctical thi ngs for the ma sses combi ne good, effective thr oug h reaching people at the s ervice of t he "last mile". Third, foster t he devel opme nt of new e nergy, new G eneral Se cretary XI Jinping stresse d devel opme nt of innovation forest restr uct uring, revitalizati on of the ol d industrial bases i n Northeast China is the State's maj or stra tegy, Ce ntral has i ssue d compre hensive opini ons of revitalizing Northea st Chi na and other old i ndustrial bases, t he CPC Ce ntral Committee on revitalization in Nort heast China wer e ... V igorous determi nation does not waver, the work does not sla cken off. Be firm with in the development ha s more to do with hard, a nd not muddl e along, pas sive ina ction. To rely on t heir ow n efforts, ca n't wait, ca n't wait, stand still. T his not only provi des new opportunities for devel opme nt in our region, and gave us new requir ements . We must s e ize the opportunit y, full use of nati onal poli cy, has to be more compli cated, to start a nd target, give ful l play to t he initiative of lea ding cadres at all level s, active, a ctive, focusi ng on buildi ng new mome ntum for devel opme nt, accelerating tra nsformation of forest development. To impleme nt the new devel opme nt philosophy. Phil os ophy is the a ction guide, new i deas a nd new developments. Carrying out innovation, coor dinati on a nd development of green, open, s hared i deas , must be mea surabl e, dire ct acti on with new development concept s, training cadres. In a new devel opme nt concept as a yardstick. Esta blis hed i n line wit h the new concept of evaluation system and evaluation criteri on, embodies the new development poli cy, organizati on, mandate impleme ntation, always meas ured by the new development phil os ophy, conti nuous corre ction of forest transition course. I n a ne w devel opme nt conce pt for the pat h comma nd. A s part of the impl ementation of the new devel opme nt philosophy followe d and acti on g uideli nes, firmly adj usted, corre cted a nd reje ct unsuita ble, i nappropriate a nd eve n against the ne w devel opme nt ideas , be ha viors and practi ces, mor e pragmatic approa ch base d on a broa d vision, and creatively carry out ecol ogical construction, industri al deve l opment , improving people's live lihood, such a s the w ork to ensure that new development ide as take root i n forest areas. I n a new devel opme nt concept for wea pon training cadre. E ducation lea ders "in t he ne w, nothi ng" two article s, enhancing vitality a nd p ower. Com bine d devel opme nt "six big industry", and impleme ntation "three big engi neeri ng", and create "two big e nvironme nt", strengtheni ng on new development, and ne w economy conce pt of learni ng, and grasp a nd using , real put thought and acti on unified to new development concept up, at wit h new development conce pt armed himself, and gui de pra ctice, effective do adv ocate i nnovation, a nd focused on coor dinati on, a nd adv ocate gree n, and thi ck plant open, and advance s hared. Se cond, w e must rely on Scie nce a nd te chnol ogy affects. Te chnical i nnovation i s the pr omotion of economic transformati on a nd upgradi ng, quality and efficiency "f irst power".

4. 一辆汽车在一条直线上运动, 第1s 内通过5m, 第2s 内通过10m,第3s 内通过20m, 第4s 内通过5m, 则 最初 两 秒 的 平均速度 是 m/s,最后两秒的平均速度是 m/s,全部时 间的平均速度是 m/s. 五、匀速直线运动 1.在一条直线上运动的物体,如果在任何相等的时间里通过的 都相等,就叫匀速直线运动。 匀速直线运动过程中,速度 。 2.匀速直线运动的 x —t 图象是一条倾斜的直线,直线的斜率等于 。 匀速直线运动的 v—t 图象是一条 的直线,某段时间内位移的大小与图线所包围 的 相等。 六、加速度 1.为了描述速度变化 这一特征,我们引入加速度的概念:加速度是速度的 与发生 这一变化 的比值,通常用 a 表示,若用 v 表示速度在时间间隔 t 内的变化,则有: a= 。加速度是矢量,其方向与速度的 的方向相同,加速度的单位是 。 2.下列关于速度和加速度的说法中,正确的是 ( ) A.物体运动的速度为零,它的加速度一定为零 B.物体运动的加速度为零,它的速度一定为零 C.物体运动的速度改变很小,它的加速度可能很大 D.加速度是表示物体运动速度对时间的变化率 3.汽车原来静止,起动后 5 s 达到 10 m/s ,以后匀速运动 20 min ,遇到紧急情况而紧急刹车,经 2 s 停下,则该汽车前 5 s 的平均加速度是 ,中间 20 min 的加速度是 ,最后 2 s 的平 均加速度是 。 2 4.做匀加速直线运动的物体,加速度为2 m/s ,下列说法正确的是( ) A.物体在任一秒末的速度是该秒初的速度的两倍 B.物体在任一秒末速度比该秒初的速度大2 m/s C.物体在任一秒的初速度比前一秒的末速度大2 m/s D.物体在任一秒的位移都比前一秒内的位移增加2 m 七、匀速直线运动的位移图像——是一条倾斜的直线,可能通过原点,也可能不过原点。 (一条倾斜的直 线——匀速直线运动,随着时间的增加,位移越来越大;平行于时间轴的直线 ——静止,随着时间的增 加,位移不变。 ) 匀速直线运动的速度图像——是一条平行于时间轴的直线,随着时间的增加,速度不变。 匀变速直线运动的速度图像——是一条倾斜的直线。 (向上倾斜的直线——匀加速直线运动,随着时间的 增加,速度越来越大;向下倾斜的直线——匀减速直线运动,随着时间的增加,速度越来越小。 ) 无论那种图像,在时间轴上面的图像表示该物理量的方向为正,反之,则表示方向为负。 【巩固练习】 1、如图所示,A 表示质点做 运动,B 表示质点做 运动,C 表示质点做 运动,D 表示质 点做 运动。 2、有四个运动的物体 A、B、C、D,物体 A、B 运动的 s-t 图像如图 4 甲所示,物体 C、D 运动的 v-t 图像 如图 4 乙所示, 由图象可以判断出物体 A 做的是_________________运动; 物体 C 做的是_______________ 运动.在 0-3 s 的时间内,物体 B 运动的位移为____________m,物体 D 运动的位移为____________m.

八、实验:用打点计时器测速度 1.电火花计时器的原理与电磁打点计时器相同,不过在纸带上打点不是振针和复写纸,而是 和 。使用时 套在纸盘轴上,把 穿过限位孔。当接通电源,按下脉冲输出 开关时,计时器发出的 经放电针、墨粉纸盘到纸盘轴,产生火花放电,于是在运动的纸带上就 打出一行点迹。当电源的频率是 50 Hz 时,它每隔 打一个点。电火花计时器使用的交流电压
livelihood, i s related to people's w ell-being a nd s oci al harmony and stabilit y. We need t o prote ct and im prove the liv elihood of the people as the starting point and e ndi ng poi nt of transition and improve fore st people's feeli ng and ha ppi ness . To promote poverty relief and devel opme nt work. Im pl ementing poverty alleviation cr ucial proje ct is a major strategi c de cision made by the CPC Central Committee, is also determine d by the provi ncial "first proj ect", we must unify think ing and acti on to t he requirements of the Ce nt ral, provi ncial , resol utely win t he poverty battle. The previ ous pha se I to 18 stations, Tahe, Pine Ridg e research, visite d m any of the poor, go, the heavier, more pres sure . For poverty relief a nd development work, we must pay attenti on to it, alway s in min d, graspi ng ha nds, shoul d not be bl indly optimisti c, ther e can be no sla ck. Poverty alleviation and devel opment li es in pre cise, a ccurate. Pre sent, i n order t o find out the real base of poor people as soon as possi ble, come up with feasi ble poverty standa rds, state card, built on the basi s of docume nt management . To firmly establi sh the "poverty reducti on" concept, i ncreas e 强 很 、 力 响 影 ; 专 最 该 时 同 办 举 么 致 一 相 场 市 标 目 们 我 与 否 是 虑 考 要 首 于 对 。 外 次 其 , 合 综 和 览 展 业 行 名 著 性 际 的 内 国 加 参 择 选 先 优 the inten sity of resource integrati on, a nd relate d funding, wit h limited funds wi sely. By using a combi nation of employme nt, entre prene urship for poverty eradicati on poverty eradi cation, educati on, poverty alleviati on, me dical ai d of poverty mea ns, due to eff ects of poli cies, t hos e poli cies , ens ure the com pletion of missi on obje ctives for poverty eradicati on for the yea r. To actively pr omote the construction of new towns . In Fe bruary thi s year, pr omulgated by the State Council on further promoti ng urbanizati on construction of new opinions, pr oposed t o adhere to the pe ople -centered, four moderni zations synchr onizati on, optimizati on, e col ogy civili zation and cult ural heritage of new ur bani zation path wit h Chi nes e chara cteristics. Accor ding to district -wide construction of civiliz ed city a nd the bea utiful country side, furt her strengt heni ng of ur ban transport, water supply a nd drainage and sew age, waste di sposal ground, undergr ound, s uch as infrastructure construction, strive to create a safer and more liva ble e nvironme nt. To actively se ize the full stop a nd opportunities for poverty alleviation and devel opme nt, further efforts to i ncreas e

forest villages merge, populati on to t he County (district) Council sites a nd centres conce ntrated in vill ages and tow ns. Combi ned development of ur ban construction and touri sm industries, careful pla nni ng and constr ucti on of a number of suitabl e for reside ntial and farm tour towns and villages, f orming one village one pr oduct, a feature pattern. Cl oser to t he masse s. Since last year, our i n-dept h impleme ntation of the leadi ng cadre s of grassroots masse s at work, s olve the problems of a large number of people, get the mass es give whole hearted s upport to a nd praise, thi s work w ill carry on, abs olutely cannot or mov ement. Gras sroot s masses a nd cadres i n combinati on w ith poverty reduction, combined with t he steady w ork of

2

letters and calls, a nd do pra ctical thi ngs for the ma sses combi ne good, effective thr oug h reaching people at the s ervice of t he "last mile". Third, foster t he devel opme nt of new e nergy, new G eneral Se cretary XI Jinping stresse d devel opme nt of innovation forest restr uct uring, revitalizati on of the ol d industrial bases i n Northeast China is the State's maj or strategy, Ce nt ral has i ssue d compre hensive opini ons of revitalizing Northea st Chi na and other old i ndustrial bases, t he CPC Ce ntral Committ ee on revitalization in Nort heast China wer e ... V igorous determi nation does not waver, the work does not sla cken off. Be firm with in the development ha s more to do with hard, a nd not muddl e along, pas sive ina ction. To rely on t heir ow n efforts, ca n't wait , ca n't wait, stand still. T his not only provi des new opportunities for devel opme nt in our region, and gave us new requirements . We must s e ize the opportunit y, full use of nati onal poli cy, has to be more compli cated, to start a nd target, give full play to t he initiative of lea ding cadres at all level s, active, a ctive, focusi ng on buildi ng new mome ntum for devel opme nt, accelerating tr a nsformation of forest development. To impleme nt the new devel opme nt philosophy. Phil os ophy is the a ction guide, new i deas a nd new developments. Carrying out innovation, coor dinati on a nd development of green, open, s hared i deas , must be mea surabl e, dire ct acti on with new development concept s, training cadres. In a new devel opme nt concept as a yardstick. Esta blis hed i n line wit h the new concept of evaluation system and evaluation criteri on, embodies the new development poli cy, organizati on, mandate impleme nt ation, always meas ured by the new development phil os ophy, conti nuous corre ction of forest transition course. I n a ne w devel opme nt conce pt for the pat h comma nd. A s part of the impl ementation of the new devel opme nt philosophy followe d and acti on g uideli nes, firmly adj usted, corre cted a nd reje ct unsuita ble, i nappropriate a nd eve n against the ne w devel opme nt ideas , be ha viors and practi ces, mor e pragmatic approa ch base d on a broa d vision, and creatively carry out ecol ogical construction, industri al devel opment , improving people's live lihood, such a s the w ork to ensure that new development ide as take root i n forest areas. I n a new devel opme nt concept for wea pon training cadre. E ducation lea ders "in t he ne w, nothi ng" two article s, enhancing vitality a nd power. Com bine d devel opme nt "six big industry", and impleme ntation "three big engi neeri ng", and create "two big e nvironme nt", strengtheni ng on new development, and ne w economy conce pt of learni ng, and grasp a nd using , real put thought and acti on unified to new development concept up, at wit h new development conce pt armed himself, and gui de pra ctice, effective do adv ocate i nnovation, a nd focused on coor dinati on, a nd adv ocate gree n, and thi ck plant open, and advance s hared. Se cond, w e must rely on Scie nce a nd te chnol ogy affects. Te chnical i nnovation i s the pr omotion of economic transformati on a nd upgradi ng, quality and efficiency "first power" .

是 ,电磁打点计时器使用的交流电压是 。 2、在用打点计时器研究物体运动时,为了得到物体完整的运动情况,对接通电源和让纸带(随物体)开 始运动,这两个操作的先后顺序应当是 ( ) A.先接通电源,后释放纸带 B.先释放纸带,后接通电源 C.释放纸带的同时接通电源 D.先接通电源或先释放纸带都可以 【自我检测】 1.研究下列问题时,可以把火车看成质点的是 ( ) A.研究人在火车上走动的速度 B.研究火车沿平直轨道运动的速度变化 C.研究火车车轮的运动情况 D.研究火车过山洞隧道所需要的时间 2.雨滴落到窗台的速度为 5 m/s,经过窗户的速度是 4 m/s,那么 ( ) A.5 m/s 是平均速度,4 m/s 是瞬时速度 B. 5 m/s 是瞬时速度,4 m/s 是平均速度 C. 5 m /s 和 4 m/s 都是平均速度 D.5 m/s 和 4 m/s 都是瞬时速度 3、下列关于速度的说法正确的是( ) A.速度是描述物体位置变化的物理量 B.速度方向就是物体运动的方向 C.位移方向和速度方向一定相同 D.匀速直线运动的速度方向是可以改变的 4.一物体做加速运动,加速度大小为 2 m/s ,正确的说法是 ( ) A.1 s 内 物体的速度一定变化了 2 m/s B、 1 s 内物体的速度一定增加了 2 m/s C.物体的速度变化量是 2 m/s D.加速度的方向与速度的方向一定相同 5.如图所示为甲、乙物体运动的 x-t 图象,则下列说法正确的是( ) A.甲物体做变速直线运动,乙物体做匀速直线运动 B.两物体的初速度都为零 C.在 t1 时间内两物体平均速度相等 D.相遇时,甲的速度大于乙的速度 6、沿一条直线运动的物体,当物体的加速度逐渐减小时,下列说法正确的是: A、物体运动的速度一定增大 B、物体运动的速度一定减小 C、物体运动速度的变化量一定减少 D、物体运动的路程一定增大 7、下列描述中不可能存在的是:( ) A.速度很大,加速度很小. B.速度变化很大,加速度很小. C.速度为零,加速度不为零. D. 速度变化方向为正, 加速度方向为负. 8、 甲乙两个物体从同一地点沿同一方向做直线运动的速度图象如图所示, 则( ) A.两个物体两次相遇的时刻是 2s 末和 6s 末 B.4s 时甲在乙的后面 C.2s 时两物体相距最远 D.甲物体一直向前运动而乙物体向前运动 2s,随后向后运动 9、如图所示为一物体沿直线运动的 s-t 图象,则( ) A.第 2 s 内的位移10m B.第 4 s 内的位移15m C.前 5 s 的总路程50m D.前 5 s 的位移10m 2 10、物体做匀加速直线运动,加速度为 2m. / s ,若此物体在 3s 末的速度为 5m/s,则下列说法正确的是( ) A.物体在 4s 末的速度为 7m/s B.物体在 5s 初的速度为 9m/s C.物体在任意 1s 的末速度一定比前 1s 的末速度大 2m/s D.物体在任意 1s 的末速度一定比前 1s 的初速度大 2m/s 11、在“练习使用打点计时器”的实验中,某同学选出了一条清晰的纸带,并取其中的 A 、B 、C 、…… 七个点进行研究,这七个点和刻度尺标度的对应如图 5 所示。

livelihood, i s related to people's w ell-being a nd s oci al harmony and stabilit y. We need t o prote ct and im prove the liv elihood of the people as the starting point and e ndi ng poi nt of transition and improve fore st people's feeli ng and ha ppi ness . To promote poverty relief and devel opme nt work. Im pl ementing poverty alleviation cr ucial proje ct is a major strategi c de cision made by the CPC Central Committee, is also determine d by the provi ncial "first proj ect", we must unify think ing and acti on to t he requirements of the Ce ntral, provi ncial , resol utely win t he poverty battle. The previ ous pha se I to 18 stations, Tahe, Pine Ridg e research, visite d many of the poor, go, the heavier, mor e pres sure . For poverty relief a nd development work, we must pay attenti on to it, alway s in mind, graspi ng ha nds, shoul d not be bl indly optimisti c, ther e can be no sla ck. Poverty alleviation and devel opment li es in pre cise, a ccurate. Pre sent, i n order t o f ind out the real base of poor people as soon as possi ble, come up with feasi ble poverty standards, state card, built on the basi s of docume nt management . To firmly establi sh the "poverty reducti on" concept, i ncreas e 强 很 、 力 响 影 ; 专 最 该 时 同 办 举 么 致 一 相 场 市 标 目 们 我 与 否 是 虑 考 要 首 于 对 。 外 次 其 , 合 综 和 览 展 业 行 名 著 性 际 的 内 国 加 参 择 选 先 优 the intensity of resource integrati on, a nd relate d funding, wit h limited funds wi sely. By using a combi nation of employme nt, entre prene urship for poverty eradicati on poverty eradi cation, educati on, poverty alleviati on, me dical ai d of poverty mea ns, due to effects of poli cies, t hos e poli cies , ens ure the com pletion of missi on obje ctives for poverty eradicati on for the yea r. To actively pr omote the construction of new to wns . In Fe bruary thi s year, pr omulgated by the State Council on further promoti ng urbanizati on construction of new opinions, pr oposed t o adhere to the pe ople -centered, four moderni zations synchr onizati on, optimizati on, e col ogy civili zation and cult ural heritage of new ur bani zation path wit h Chi nes e chara cteristics. Accor ding to district -wide construction of civiliz ed city a nd the bea utiful country side, furt her strengt heni ng of ur ban transport, water supply a nd drainage and sew age, waste di sposal ground, undergr ou nd, s uch as infrastructure construction, strive to create a safer and more liva ble e nvironme nt. To actively se ize the full st op a nd opportunities for poverty alleviation and devel opme nt, further efforts to i ncreas e

forest villages merge, populati on to t he County (district) Council sites a nd centres conce ntrated in vill ages and tow ns. Combi ned development of ur ban construction an d touri sm industries, careful pla nni ng and constr ucti on of a number of suitabl e for reside ntial and farm tour towns and villages, f orming one village one pr oduct, a feature pattern. Cl oser to t he masse s. Since last year, our i n-dept h impleme ntation of the leadi ng cadre s of grassroots masse s at work, s olve the problems of a large number of people, get the mass es give whole hearted s upport to a nd praise, thi s work w ill carry on, abs olutely cannot or mov ement. Gras sroot s masses a nd cadres i n combinati on w ith poverty reduction, combined with t he steady w ork of

3

letters and calls, a nd do pra ctical thi ngs for the ma sses combi ne good, effective thr oug h reaching people at the s ervice of t he "last mile". Third, foster t he devel opme nt of new e nergy, new G eneral Se cretary XI Jinping stresse d devel opme nt of innovation forest restr uct uring, revitalizati on of the ol d industrial bases i n Northeast China is the State's maj or stra tegy, Ce ntral has i ssue d compre hensive opini ons of revitalizing Northea st Chi na and other old i ndustrial bases, t he CPC Ce ntral Committee on revitalization in Nort heast China wer e ... V igorous determi nation does not waver, the work does not sla cken off. Be firm with in the development ha s more to do with hard, a nd not muddl e along, pas sive ina ction. To rely on t heir ow n efforts, ca n't wait, ca n't wait, stand still. T his not only provi des new opportunities for devel opme nt in our region, and gave us new requir ements . We must s e ize the opportunit y, full use of nati onal poli cy, has to be more compli cated, to start a nd target, give ful l play to t he initiative of lea ding cadres at all level s, active, a ctive, focusi ng on buildi ng new mome ntum for devel opme nt, accelerating tra nsformation of forest development. To impleme nt the new devel opme nt philosophy. Phil os ophy is the a ction guide, new i deas a nd new developments. Carrying out innovation, coor dinati on a nd development of green, open, s hared i deas , must be mea surabl e, dire ct acti on with new development concept s, training cadres. In a new devel opme nt concept as a yardstick. Esta blis hed i n line wit h the new concept of evaluation system and evaluation criteri on, embodies the new development poli cy, organizati on, mandate impleme ntation, always meas ured by the new development phil os ophy, conti nuous corre ction of forest transition course. I n a ne w devel opme nt conce pt for the pat h comma nd. A s part of the impl ementation of the new devel opme nt philosophy followe d and acti on g uideli nes, firmly adj usted, corre cted a nd reje ct unsuita ble, i nappropriate a nd eve n against the ne w devel opme nt ideas , be ha viors and practi ces, mor e pragmatic approa ch base d on a broa d vision, and creatively carry out ecol ogical construction, industri al deve l opment , improving people's live lihood, such a s the w ork to ensure that new development ide as take root i n forest areas. I n a new devel opme nt concept for wea pon training cadre. E ducation lea ders "in t he ne w, nothi ng" two article s, enhancing vitality a nd p ower. Com bine d devel opme nt "six big industry", and impleme ntation "three big engi neeri ng", and create "two big e nvironme nt", strengtheni ng on new development, and ne w economy conce pt of learni ng, and grasp a nd using , real put thought and acti on unified to new development concept up, at wit h new development conce pt armed himself, and gui de pra ctice, effective do adv ocate i nnovation, a nd focused on coor dinati on, a nd adv ocate gree n, and thi ck plant open, and advance s hared. Se cond, w e must rely on Scie nce a nd te chnol ogy affects. Te chnical i nnovation i s the pr omotion of economic transformati on a nd upgradi ng, quality and efficiency "f irst power".

(1)由图可以知道,A 、B 两点的时间间隔是 s ,纸带做的是 (填加速、减速或匀速)直线运 动。 (2)可求出 A 点到 D 点的平均速度是 m/s ,D 点到 G 点的平均速度是 m/s ; (注意有效数字的 位数,即小数点后应保留几位小数) 12.某兴趣小组的同学们在做“用打点计时器测速度”的实验中,让重锤自由下落,打出的一条纸带如 图所示,图中直尺的单位为 cm,点 O 为纸带上记录到的第一点,点 A、B、C、D……依次表示点 O 以后连 续的 各点。已知打点计时器每隔 T=0.02 s 打一个点。

(1)打点计时器打下点 G 时重锤的速度可用表达式 vG=________进行计算,式中各量的意义是____ (2)用上式计算出打下点 G 时重锤的速度为 vG=____ ________m/s 13、某运动员在百米跑道上以 8m/s 的速度跑了 80m ,然后又以 2m/s 的速度走了 20m ,这个运动员通过 这段路的平均速度是多少?

14、甲、乙两辆汽车,在行驶时甲车能达到的最大速度是乙车能达到的最大速度的 2 倍。如果两车都从 静止开始做匀加速直线运动,甲车达到最大速度所用的时间是乙车达到最大速度所用时间的 1/3,求甲、 乙两车的加速度大小之 比?

15 、如图展示了某质点做直线运动的 v-t 图象。 试根据图象求出: (1)第 5s 内的加速度; (2)前 4s 内的位移。

16、甲、乙两玩具小车原来相距 1.5m,甲在后,乙在前,沿相互平行的 两条直线向同一方向运动,从某时刻开始它们的 v-t 图线如图所示。忽 略小车的大小,试求它们相遇的时刻。

17.(2001 年上海)如图所示,图 A 是高速公路上用超声波测速仪测量车速的示意图,测速仪发出并接收 超声波脉冲信号.根据发出和接收的信号间的时间差,测出被测物体的速度.图 B 中 P1、P2 是测速仪发出 的超声波信号,n1、n2 分别是 P1、P2 由汽车反射回来的信号.设测速仪匀速扫描,P1、P2 之间的时间间隔Δ t=1.0s, 超声波在空气中传播速度是 v=340 m/s,若汽车是匀速行驶的,则根据图 B 可知,汽车在接 收到 P1、P2 两个信号之间的时间内前进的距离是多少米?汽车的速度是多少米/秒?

livelihood, i s related to people's w ell-being a nd s oci al harmony and stabilit y. We need t o prote ct and im prove the liv elihood of the people as the starting point and e ndi ng poi nt of transition and improve fore st people's feeli ng and ha ppi ness . To promote poverty relief and devel opme nt work. Im pl ementing poverty alleviation cr ucial proje ct is a major strategi c de cision made by the CPC Central Committee, is also determine d by the provi ncial "first proj ect", we must unify think ing and acti on to t he requirements of the Ce nt ral, provi ncial , resol utely win t he poverty battle. The previ ous pha se I to 18 stations, Tahe, Pine Ridg e research, visite d m any of the poor, go, the heavier, more pres sure . For poverty relief a nd development work, we must pay attenti on to it, alway s in min d, graspi ng ha nds, shoul d not be bl indly optimisti c, ther e can be no sla ck. Poverty alleviation and devel opment li es in pre cise, a ccurate. Pre sent, i n order t o find out the real base of poor people as soon as possi ble, come up with feasi ble poverty standa rds, state card, built on the basi s of docume nt management . To firmly establi sh the "poverty reducti on" concept, i ncreas e 强 很 、 力 响 影 ; 专 最 该 时 同 办 举 么 致 一 相 场 市 标 目 们 我 与 否 是 虑 考 要 首 于 对 。 外 次 其 , 合 综 和 览 展 业 行 名 著 性 际 的 内 国 加 参 择 选 先 优 the inten sity of resource integrati on, a nd relate d funding, wit h limited funds wi sely. By using a combi nation of employme nt, entre prene urship for poverty eradicati on poverty eradi cation, educati on, poverty alleviati on, me dical ai d of poverty mea ns, due to eff ects of poli cies, t hos e poli cies , ens ure the com pletion of missi on obje ctives for poverty eradicati on for the yea r. To actively pr omote the construction of new towns . In Fe bruary thi s year, pr omulgated by the State Council on further promoti ng urbanizati on construction of new opinions, pr oposed t o adhere to the pe ople -centered, four moderni zations synchr onizati on, optimizati on, e col ogy civili zation and cult ural heritage of new ur bani zation path wit h Chi nes e chara cteristics. Accor ding to district -wide construction of civiliz ed city a nd the bea utiful country side, furt her strengt heni ng of ur ban transport, water supply a nd drainage and sew age, waste di sposal ground, undergr ound, s uch as infrastructure construction, strive to create a safer and more liva ble e nvironme nt. To actively se ize the full stop a nd opportunities for poverty alleviation and devel opme nt, further efforts to i ncreas e

forest villages merge, populati on to t he County (district) Council sites a nd centres conce ntrated in vill ages and tow ns. Combi ned development of ur ban construction and touri sm industries, careful pla nni ng and constr ucti on of a number of suitabl e for reside ntial and farm tour towns and villages, f orming one village one pr oduct, a feature pattern. Cl oser to t he masse s. Since last year, our i n-dept h impleme ntation of the leadi ng cadre s of grassroots masse s at work, s olve the problems of a large number of people, get the mass es give whole hearted s upport to a nd praise, thi s work w ill carry on, abs olutely cannot or mov ement. Gras sroot s masses a nd cadres i n combinati on w ith poverty reduction, combined with t he steady w ork of

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letters and calls, a nd do pra ctical thi ngs for the ma sses combi ne good, effective thr oug h reaching people at the s ervice of t he "last mile". Third, foster t he devel opme nt of new e nergy, new G eneral Se cretary XI Jinping stresse d devel opme nt of innovation forest restr uct uring, revitalizati on of the ol d industrial bases i n Northeast China is the State's maj or strategy, Ce nt ral has i ssue d compre hensive opini ons of revitalizing Northea st Chi na and other old i ndustrial bases, t he CPC Ce ntral Committ ee on revitalization in Nort heast China wer e ... V igorous determi nation does not waver, the work does not sla cken off. Be firm with in the development ha s more to do with hard, a nd not muddl e along, pas sive ina ction. To rely on t heir ow n efforts, ca n't wait , ca n't wait, stand still. T his not only provi des new opportunities for devel opme nt in our region, and gave us new requirements . We must s e ize the opportunit y, full use of nati onal poli cy, has to be more compli cated, to start a nd target, give full play to t he initiative of lea ding cadres at all level s, active, a ctive, focusi ng on buildi ng new mome ntum for devel opme nt, accelerating tr a nsformation of forest development. To impleme nt the new devel opme nt philosophy. Phil os ophy is the a ction guide, new i deas a nd new developments. Carrying out innovation, coor dinati on a nd development of green, open, s hared i deas , must be mea surabl e, dire ct acti on with new development concept s, training cadres. In a new devel opme nt concept as a yardstick. Esta blis hed i n line wit h the new concept of evaluation system and evaluation criteri on, embodies the new development poli cy, organizati on, mandate impleme nt ation, always meas ured by the new development phil os ophy, conti nuous corre ction of forest transition course. I n a ne w devel opme nt conce pt for the pat h comma nd. A s part of the impl ementation of the new devel opme nt philosophy followe d and acti on g uideli nes, firmly adj usted, corre cted a nd reje ct unsuita ble, i nappropriate a nd eve n against the ne w devel opme nt ideas , be ha viors and practi ces, mor e pragmatic approa ch base d on a broa d vision, and creatively carry out ecol ogical construction, industri al devel opment , improving people's live lihood, such a s the w ork to ensure that new development ide as take root i n forest areas. I n a new devel opme nt concept for wea pon training cadre. E ducation lea ders "in t he ne w, nothi ng" two article s, enhancing vitality a nd power. Com bine d devel opme nt "six big industry", and impleme ntation "three big engi neeri ng", and create "two big e nvironme nt", strengtheni ng on new development, and ne w economy conce pt of learni ng, and grasp a nd using , real put thought and acti on unified to new development concept up, at wit h new development conce pt armed himself, and gui de pra ctice, effective do adv ocate i nnovation, a nd focused on coor dinati on, a nd adv ocate gree n, and thi ck plant open, and advance s hared. Se cond, w e must rely on Scie nce a nd te chnol ogy affects. Te chnical i nnovation i s the pr omotion of economic transformati on a nd upgradi ng, quality and efficiency "first power" .

livelihood, i s related to people's w ell-being a nd s oci al harmony and stabilit y. We need t o prote ct and im prove the liv elihood of the people as the starting point and e ndi ng poi nt of transition and improve fore st people's feeli ng and ha ppi ness . To promote poverty relief and devel opme nt work. Im pl ementing poverty alleviation cr ucial proje ct is a major strategi c de cision made by the CPC Central Committee, is also determine d by the provi ncial "first proj ect", we must unify think ing and acti on to t he requirements of the Ce ntral, provi ncial , resol utely win t he poverty battle. The previ ous pha se I to 18 stations, Tahe, Pine Ridg e research, visite d many of the poor, go, the heavier, mor e pres sure . For poverty relief a nd development work, we must pay attenti on to it, alway s in mind, graspi ng ha nds, shoul d not be bl indly optimisti c, ther e can be no sla ck. Poverty alleviation and devel opment li es in pre cise, a ccurate. Pre sent, i n order t o f ind out the real base of poor people as soon as possi ble, come up with feasi ble poverty standards, state card, built on the basi s of docume nt management . To firmly establi sh the "poverty reducti on" concept, i ncreas e 强 很 、 力 响 影 ; 专 最 该 时 同 办 举 么 致 一 相 场 市 标 目 们 我 与 否 是 虑 考 要 首 于 对 。 外 次 其 , 合 综 和 览 展 业 行 名 著 性 际 的 内 国 加 参 择 选 先 优 the intensity of resource integrati on, a nd relate d funding, wit h limited funds wi sely. By using a combi nation of employme nt, entre prene urship for poverty eradicati on poverty eradi cation, educati on, poverty alleviati on, me dical ai d of poverty mea ns, due to effects of poli cies, t hos e poli cies , ens ure the com pletion of missi on obje ctives for poverty eradicati on for the yea r. To actively pr omote the construction of new to wns . In Fe bruary thi s year, pr omulgated by the State Council on further promoti ng urbanizati on construction of new opinions, pr oposed t o adhere to the pe ople -centered, four moderni zations synchr onizati on, optimizati on, e col ogy civili zation and cult ural heritage of new ur bani zation path wit h Chi nes e chara cteristics. Accor ding to district -wide construction of civiliz ed city a nd the bea utiful country side, furt her strengt heni ng of ur ban transport, water supply a nd drainage and sew age, waste di sposal ground, undergr ou nd, s uch as infrastructure construction, strive to create a safer and more liva ble e nvironme nt. To actively se ize the full st op a nd opportunities for poverty alleviation and devel opme nt, further efforts to i ncreas e

forest villages merge, populati on to t he County (district) Council sites a nd centres conce ntrated in vill ages and tow ns. Combi ned development of ur ban construction an d touri sm industries, careful pla nni ng and constr ucti on of a number of suitabl e for reside ntial and farm tour towns and villages, f orming one village one pr oduct, a feature pattern. Cl oser to t he masse s. Since last year, our i n-dept h impleme ntation of the leadi ng cadre s of grassroots masse s at work, s olve the problems of a large number of people, get the mass es give whole hearted s upport to a nd praise, thi s work w ill carry on, abs olutely cannot or mov ement. Gras sroot s masses a nd cadres i n combinati on w ith poverty reduction, combined with t he steady w ork of

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