当前位置:首页>文档>专题36 实验:探究功与速度变化的关系_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36 实验:探究功与速度变化的关系_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36 实验:探究功与速度变化的关系_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36 实验:探究功与速度变化的关系_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 36 实验:探究功与速度变化的关系 1.某同学利用如图所示的装置探究功与速度变化的关系. (ⅰ)小物块在橡皮筋的作用下弹出,沿水平桌面滑行,之后平抛落至水平地面上,落 点记为M; 1 (ⅱ)在钉子上分别套上2条、3条、4条……同样的橡皮筋,使每次橡皮筋拉伸的长度 都保持一致,重复步骤(ⅰ),小物块落点分别记为M、M、M……; 2 3 4 (ⅲ)测量相关数据,进行数据处理. (1)(多选)为求出小物块抛出时的动能,需要测量下列物理量中的________(填正确答案 标号). A.小物块的质量m B.橡皮筋的原长x C.橡皮筋的伸长量Δx D.桌面到地面的高度h E.小物块抛出点到落地点的水平距离L (2)将几次实验中橡皮筋对小物块做功分别记为W 、W 、W…,小物块抛出点到落地 1 2 3 点的水平距离分别记为 L 、L 、L….若功与速度的平方成正比,则应以 W为纵坐标、以 1 2 3 ________为横坐标作图,才能得到一条直线. (3)由于小物块与桌面之间的摩擦不能忽略,则由此引起的误差属于________(填“偶然 误差”或“系统误差”). 2.[2022·安徽省九师联盟检测]实验小组用如图甲所示的装置,既可以测量物体的加速 度,也可以验证动能定理,气垫导轨与细线都水平,可由气垫导轨下端的刻度尺测出光电 门1、2之间的距离为L,可通过计时器分别读出遮光片通过光电门1、2的时间t 、t ,同 1 2 时计时器也测出滑块从光电门1到光电门2的时间t,可以通过钩码上端的拉力传感器读出 细线的拉力F,遮光片和滑块的总质量为M,打开气垫导轨,让滑块在钩码的重力作用下 做匀加速直线运动,遮光片的宽度d由游标卡尺来测量,示数如图乙所示,回答下列问题:(1)遮光片的宽度读数如图乙所示.则d=________ mm. (2)滑块的加速度a=________(用t、t、t、d来表示). 1 2 (3)验证动能定理的表达式为________(用F、t、t、L、d、M来表示). 1 2 3.[2022·安徽省A10联盟阶段性考试]某物理小组利用气垫导轨探究系统动能的变化, 实验装置如图所示. 实验步骤如下: ①用天平称出滑块和挡光条的总质量M,再称出托盘和砝码的总质量m; ②将气垫导轨放在水平桌面上,桌面高度适当,将导轨调至水平; ③测量挡光条的宽度d; ④由导轨标尺读出两光电门中心之间的距离s; ⑤将滑块移至光电门1左侧某处,待托盘静止不动时,释放滑块,托盘落地前挡光条 已通过光电门2; ⑥从数字计时器(图中未画出)上分别读出挡光条通过光电门1和光电门2所用的时间t 1 和t. 2 回答下列问题: (1)调节导轨水平时,________(选填“应该”或“不应该”)挂上托盘; (2)由图中标尺的读数可知两光电门中心之间的距离s=________ cm; (3)滑块通过光电门 1 和光电门 2 的过程中,系统总动能的变化量 ΔE = k ______________; (4)如果仅改变滑块释放点与光电门1之间的距离,在滑块通过光电门1和光电门2的 过程中,误差允许的范围内,系统总动能的变化量ΔE________(选填“会”或“不会”)发 k 生变化.
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  1. CONNECT:[ UseTime:0.000489s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000733s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000270s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000314s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000479s ]
  6. SELECT * FROM `set` [ RunTime:0.000211s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000542s ]
  8. SELECT * FROM `wendang` WHERE `id` = 368837 LIMIT 1 [ RunTime:0.000429s ]
  9. UPDATE `wendang` SET `liulancishu` = 2 WHERE `id` = 368837 [ RunTime:0.013700s ]
  10. UPDATE `wendang` SET `lasttime` = 1773087954 WHERE `id` = 368837 [ RunTime:0.000575s ]
  11. SELECT * FROM `wendang` WHERE `id` < 368837 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000483s ]
  12. SELECT * FROM `wendang` WHERE `id` > 368837 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000426s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 368837 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000999s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 368837 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002414s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 368837 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001718s ]
0.093968s