当前位置:首页>文档>专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5

专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5

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专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5
专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5
专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5
专题39动量守恒定律的理解和应用_4.2025物理总复习_赠品通用版(老高考)复习资料_专项复习_2023《微专题·小练习》·物理·L-5

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专题 39 动量守恒定律的理解和应用 1. [2022·河南省驻马店市大联考]如图所示,小车A静止于光滑水平面上,A上有一圆弧 PQ,圆弧位于同一竖直平面内,小球B由静止起沿圆弧下滑,则这一过程中( ) A.若圆弧不光滑,则系统动量守恒,机械能守恒 B.若圆弧光滑,则系统的动量不守恒,机械能守恒 C.若圆弧不光滑,则系统动量不守恒,机械能守恒 D.若圆弧光滑,则系统的动量守恒,机械能守恒 2.[2022·甘肃省临洮中学期中考试](多选)如图所示,在光滑水平面上,一速度大小为 v 的A球与静止的B球碰撞后,A球的速率为,B球的速率为,A、B两球的质量之比可能 0 是( ) A.3∶4 B.4∶3 C.8∶3 D.3∶8 3.[2022·九师联盟质量检测](多选)如图所示,光滑水平面上有一轻弹簧,其左端固定 在竖直墙壁上.一质量m =0.5 kg可视为质点的滑块A以v =12 m/s的水平速度向左运动, 1 0 撞上静止的质量m =1.5 kg可视为质点的滑块B并粘在一起向左运动,两滑块与弹簧作用 2 后原速率弹回,则下列说法正确的是( ) A.两滑块组成的系统碰撞过程中动量守恒 B.两滑块碰撞结束时的速度大小为3 m/s C.在整个过程中,两滑块组成的系统动量守恒 D.在整个过程中,弹簧对A、B系统的冲量大小为12 N·s 4. [2022·湖南省衡阳市阶段练习](多选)用不可伸长的细线悬挂一质量为M的小木块,木 块静止,如图所示,现有一质量为m的子弹自左方水平射向木块,并停留在木块中,子弹初速度为v,则下列判断正确的是( ) 0 A.从子弹射向木块到一起上升到最高点的过程中系统的机械能守恒 B.子弹射入木块瞬间动量守恒,故子弹射入木块瞬间子弹和木块的共同速度为 C.子弹和木块一起上升的过程中,子弹和木块组成的系统动量守恒 D.子弹和木块一起上升的最大高度为 5.如图水平桌面上放置一操作台,操作台上表面水平且光滑.在操作台上放置体积相 同,质量不同的甲、乙两球,质量分别为m 、m ,两球用细线相连,中间有一个压缩的轻 1 2 质弹簧,两球分别与操作台左右边缘距离相等.烧断细线后,由于弹簧弹力的作用,两球 分别向左、右运动,脱离弹簧后在操作台面上滑行一段距离,然后平抛落至水平桌面上. 则下列说法中正确的是( ) A.刚脱离弹簧时,甲、乙两球的动量相同 B.刚脱离弹簧时,甲、乙两球的动能相同 C.甲、乙两球不会同时落到水平桌面上 D.甲、乙两球做平抛运动的水平射程之比为m∶m 1 2 6. [2022·江西省萍乡市阶段练习]在光滑水平地面上放置一辆小车,车上放置有木盆,在 车与木盆以共同的速度向右运动时,有雨滴以极小的速度竖直落入木盆中而不溅出,如图 所示,则在雨滴落入木盆的过程中,小车速度将( ) A.保持不变 B.变大 C.变小 D.不能确定 7.滑板运动是青少年比较喜欢的一种户外运动.现有一个质量为m的小孩站在一辆 质量为λm的滑板车上,小孩与滑板车一起在光滑的水平路面上以速度 v 匀速运动,突然 0 发现前面有一个小水坑,由于来不及转向和刹车,该小孩立即相对滑板车以速度 v 向前跳 0 离滑板车,滑板车速度大小变为原来的,但方向不变,则λ为( ) A.1 B.2 C.3 D.4 8.[2022·江苏省常州市质量调研]光滑水平面上放有一上表面光滑、倾角为α的斜面体A,斜面体质量为M、底边长为L,如图所示.将一质量为m、可视为质点的滑块B从斜 面的顶端由静止释放,滑块B经过时间t刚好滑到斜面底端.此过程中斜面对滑块的支持 力大小为F ,则下列说法中正确的是( ) N A.F =mg cos α N B.滑块下滑过程中支持力对B的冲量大小为F t cos α N C.滑块B下滑的过程中A、B组成的系统动量守恒 D.此过程中斜面体向左滑动的距离为L 9.[2022·陕西省泾阳县期中]如图所示,质量m=2 kg的小铁块(可视为质点)放在长木 板左端,长木板质量M=4 kg,静止在光滑水平面上,当给小铁块施加大小为6 N·s、方 向水平向右的瞬时冲量后,经过0.8 s木板和小铁块达到共同速度.重力加速度 g取10 m/s2,则长木板与小铁块的共同速度大小和二者之间的动摩擦因数分别为( ) A.0.8 m/s 0.5 B.0.8 m/s 0.25 C.1 m/s 0.5 D.1 m/s 0.25 10.[2022·黑龙江省双鸭山一中考试]如图所示,质量为m的滑块A套在一水平固定的 光滑细杆上,可自由滑动.在水平杆上固定一挡板 P,滑块靠在挡板P左侧且处于静止状 态,其下端用长为L的不可伸长的轻质细线悬挂一个质量为3m的小球B,已知重力加速度 大小为g.现将小球B拉至右端水平位置,使细线处于自然长度,由静止释放,忽略空气阻 力,求: (1)小球第一次运动至最低点时,细线拉力的大小; (2)滑块运动过程中,所能获得的最大速度. 11.如图所示,甲、乙两名宇航员正在离静止的空间站一定距离的地方执行太空维修 任务.某时刻甲、乙都以大小为v =2 m/s的速度相向运动,甲、乙和空间站在同一直线 0 上且可视为质点.甲和他的装备总质量为M =90 kg,乙和他的装备总质量为M =135 1 2kg,为了避免直接相撞,乙从自己的装备中取出一质量为 m=45 kg的物体A推向甲,甲 迅速接住A后即不再松开,此后甲、乙两宇航员在空间站外做相对距离不变的同向运动, 且安全“飘”向空间站. (1)乙要以多大的速度v将物体A推出; (2)设甲与物体A作用时间为t=0.5 s,求甲与A的相互作用力F的大小.
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  1. CONNECT:[ UseTime:0.000975s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001552s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000720s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000633s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001380s ]
  6. SELECT * FROM `set` [ RunTime:0.000522s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001534s ]
  8. SELECT * FROM `wendang` WHERE `id` = 368863 LIMIT 1 [ RunTime:0.007271s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 368863 [ RunTime:0.001428s ]
  10. UPDATE `wendang` SET `lasttime` = 1773085270 WHERE `id` = 368863 [ RunTime:0.001173s ]
  11. SELECT * FROM `wendang` WHERE `id` < 368863 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001157s ]
  12. SELECT * FROM `wendang` WHERE `id` > 368863 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001054s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 368863 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002976s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 368863 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009635s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 368863 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012068s ]
0.138479s