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热点7 运动学和动力学图像_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训

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热点7 运动学和动力学图像_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训
热点7 运动学和动力学图像_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训
热点7 运动学和动力学图像_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训
热点7 运动学和动力学图像_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训

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热点 7 运动学和动力学图像 1.(2022·浙江省金华十校模拟)2022年初金华轨道交通金义线正式开通,某次列车从进站 减速到以一定的速度离开车站的这段时间内的速度—时间图像如图所示,对于该列车下列 说法正确的是( ) A.进站减速时列车的加速度大小为1.2 m/s2 B.列车在加速与减速两阶段运动的位移相同 C.若列车总质量不变,则减速时列车所受的合外力比加速时列车所受的合外力大 D.若列车在该站不停车,以30 m/s的速度匀速驶过该站,与原来相比,通过车站的运行 时间少耗费22.5 s 2.(2022·辽宁省模拟)如图所示是某同学站在力传感器上,先下蹲后站起过程中力传感器的 示数随时间的变化图像.重力加速度g取10 m/s2,则下列说法正确的是( ) A.在1~2 s时间内,该同学完成了一次下蹲再站起的过程 B.下蹲过程,该同学始终处于失重状态;站起过程,该同学始终处于超重状态 C.全过程中,该同学重心的加速度的最大值约为6 m/s2 D.若仅缩短该同学下蹲所用时间,图线峰值一定不会发生变化 3.(2022·湖南省隆回县第二中学模拟)实验小组通过实验研究汽车在晴天干燥路面和雨天湿 滑路面上的制动效果.在晴天干燥路面测试的初速度为 30 m/s,从发出刹车指令到汽车停 下的过程的v-x图像如图所示.在雨天湿滑路面测试的初速度为 24 m/s,假设人的反应时 间不变,从发出刹车指令到汽车停下的过程经过的位移与晴天干燥路面时相同.根据v-x 图像及所给数据可以推断两种情况下汽车刹车的加速度大小之比a ∶a 为( ) 干 湿 A.5∶4 B.5∶3 C.4∶3 D.3∶24.(2022·安徽黄山市第二次质检)甲、乙两车在平直公路上沿同一方向行驶,其 v-t图像如 图所示,在t=0时刻,乙车在甲车前方x 处,在0~t 时间内乙车的位移为x.下列判断正确 0 1 的是( ) A.若甲、乙在t 时刻相遇,则x=3x 1 0 B.若甲、乙在t 时刻相遇,则下次相遇时刻为2t 1 1 C.若x=x,则甲、乙一定相遇一次 0 D.若x=x,则甲、乙一定相遇两次 0 5.(2022·辽宁省模拟)如图所示,轻弹簧的下端固定在水平桌面上,上端放有物块P,系统 处于静止状态,现用竖直向下的力F作用在P上,使其向下做匀加速直线运动,在弹簧的 弹性限度内,下列是力F和运动时间t之间的关系图像,正确的是( ) 6.(2022·辽宁省模拟)为保障灾民生命财产安全,消防队员利用无人机为灾民配送物资,某 次在执行任务时,无人机从地面起飞,将配送物资运输到预定地点,在飞行过程中,通过 速度传感器测出无人机在水平方向和竖直方向的分速度v 和v 随飞行时间t的关系图像如 x y 图甲、乙所示,无人机到达最大高度后释放物资,物资落在预定地点,不计空气阻力,g 取10 m/s2,以下说法正确的是( ) A.在0~10 s内,无人机做曲线运动 B.25 s时无人机速度大小为10 m/s C.30 s时无人机加速度大小为0.6 m/s2 D.物资从释放到到达预定地点经历的时间为6 s 7.(2022·山东青岛市三模)如图,相同的物块a、b用沿半径方向的细线相连放置在水平圆 盘上.当圆盘绕转轴转动时,物块a、b始终相对圆盘静止.下列关于物块a所受的摩擦力 随圆盘角速度的平方(ω2)的变化关系正确的是( )8.(多选)(2022·全国乙卷·20)质量为1 kg的物块在水平力F的作用下由静止开始在水平地面 上做直线运动,F与时间t的关系如图所示.已知物块与地面间的动摩擦因数为0.2,重力 加速度大小取g=10 m/s2.则( ) A.4 s时物块的动能为零 B.6 s时物块回到初始位置 C.3 s时物块的动量为12 kg·m/s D.0~6 s时间内F对物块所做的功为40 J 9.(多选)(2022·广东茂名市二模)如图甲,在蹦极者身上装好传感器,可测量他在不同时刻 下落的高度及速度大小.蹦极者从蹦极台自由下落,利用传感器与计算机结合得到如图乙 所示的速度(v)-位移(l)图像.蹦极者及所携带设备的总质量为60 kg,不计空气阻力,重力 加速度g取10 m/s2,下列表述正确的是( ) A.整个下落过程,蹦极者及设备组成的系统机械能不守恒 B.从弹性绳刚伸直开始,蹦极者做减速运动 C.蹦极者动能最大时,弹性绳的拉力大小等于重力D.弹性绳的弹性势能最大值为15 600 J 10.(多选)(2022·安徽合肥市质检)如图甲所示,轻弹簧一端固定在竖直墙壁上,另一端与 物块P拴接.现用外力将P缓慢压至O点,此时弹簧的压缩量为3l,撤去外力后P向右运 0 动;换用质量较小的物块Q完成同样的过程.在两物块第一次向右运动至最远的过程中, 它们的加速度a与位移x的关系如图乙所示.已知两物块与水平地面间的动摩擦因数相同, 且E=kx2.下列说法正确的是( ) p A.释放瞬间Q的加速度是P的3倍 B.P的质量是Q的2倍 C.P的最大动能是Q的4倍 D.Q向右运动的最大距离是P的2倍
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  1. CONNECT:[ UseTime:0.000923s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001655s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000980s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000726s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001618s ]
  6. SELECT * FROM `set` [ RunTime:0.003311s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001591s ]
  8. SELECT * FROM `wendang` WHERE `id` = 372533 LIMIT 1 [ RunTime:0.002812s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 372533 [ RunTime:0.029800s ]
  10. UPDATE `wendang` SET `lasttime` = 1773110770 WHERE `id` = 372533 [ RunTime:0.004662s ]
  11. SELECT * FROM `wendang` WHERE `id` < 372533 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005966s ]
  12. SELECT * FROM `wendang` WHERE `id` > 372533 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001711s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 372533 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.018674s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 372533 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013074s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 372533 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013319s ]
0.252951s