图示均质板质量为m，放在两个均质圆柱滚子上，滚子质量皆为，其半径均为r。如在板上作用一水平力F，并设滚子无滑

A .https://assets.asklib.com/psource/2015103013404380086.jpg B .https://assets.asklib.com/psource/2015103013405625098.jpg C .https://assets.asklib.com/psource/2015103013411023231.jpg D .https://assets.asklib.com/psource/2015103013412477091.jpg

A . mvhttps://assets.asklib.com/psource/2015102908465835572.jpg ／16B . 3mvhttps://assets.asklib.com/psource/2015102908465835572.jpg ／16C . mvhttps://assets.asklib.com/psource/2015102908465835572.jpg ／4D . 3mvhttps://assets.asklib.com/psource/2015102908465835572.jpg ／4

A . mR ω B . 2mR ω C . 3mR ω D . （1／2）mR ω

A .https://assets.asklib.com/psource/2015103014581873942.jpg B .https://assets.asklib.com/psource/2015103014583464941.jpg C .https://assets.asklib.com/psource/2015103014590974949.jpg D .https://assets.asklib.com/psource/201510301459195520.jpg

A . mRω，mRω，mlω，ml/2ω B . 0，mRω，ml/2ω，0 C . mRω，mRω，ml/2ω，0 D . 0，mRω，mlω，ml/2ω

A . A B . B C . C D . D

A .https://assets.asklib.com/psource/2015110210445299344.png B .https://assets.asklib.com/psource/2015110210445634005.png C .https://assets.asklib.com/psource/2015110210450060318.png D .https://assets.asklib.com/psource/201511021045046946.png

A . T=mr2ω2B . T=mr2ωhttps://assets.asklib.com/images/image2/2017032913402451594.jpg 2C . T=mr2https://assets.asklib.com/images/image2/2017032913403977808.jpg ω2D . T=mr2https://assets.asklib.com/images/image2/2017032913404767584.jpg ω2

<img src='https://img2.soutiyun.com/ask/uploadfile/5097001-5100000/f2bbe390993478cb409f9ccc28c1b771.png' /> A．<img src='https://img2.soutiyun.com/ask/uploadfile/5097001-5100000/d3b0b10d995224fcb7aa65edfd06358c.png' />B．m₂gh C．<img src='https://img2.soutiyun.com/ask/uploadfile/5097001-5100000/8ac00e32bd2362d9b994ce31e73becdb.png' />D．0

<img src='https://img2.soutiyun.com/ask/uploadfile/5088001-5091000/0a17aa9b2811a784c73e007ea80e7b60.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' />

<img src='https://img2.soutiyun.com/ask/uploadfile/2652001-2655000/c6aea0f4da12c57bf5064bbf6a93675f.gif' />

是 否

均质圆柱体A的质量为m，在外圆上绕以细绳，绳的一端B固定不动，如图12-20所示。当BC铅垂时圆柱下降，其初速为零。求当圆柱体的轴心降落了高度h时轴心的速度和绳子的张力。 <img src='https://img2.soutiyun.com/ask/uploadfile/5094001-5097000/a3db711992c036a06eb5ae138c9f0627.jpg' />

<img src='https://img2.soutiyun.com/ask/uploadfile/5091001-5094000/32b2751efaeac04b7c38b16399391475.png' />

<img src='https://img2.soutiyun.com/ask/uploadfile/2295001-2298000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' /> A．<img src='https://img2.soutiyun.com/ask/uploadfile/2295001-2298000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' /> B．<img src='https://img2.soutiyun.com/ask/uploadfile/2295001-2298000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' /> C．4mlω D．3mlω

图(a)所示一均质圆柱体，质量为m，半径为r, 沿水平面作无滑动的滚动。原来质心以等速vc运动，突然圆柱与1高为h (h小于r)的凸台碰撞。设碰撞是塑性的，求刚柱体碰撞后质心的速度<img src='https://img2.soutiyun.com/ask/2020-07-15/963651650155441.png' />、柱体的角速度和碰撞冲量。 <img src='https://img2.soutiyun.com/ask/2020-07-15/963651659617982.png' /><img src='https://img2.soutiyun.com/ask/2020-07-15/963651666373368.png' />

<img src='https://img2.soutiyun.com/ask/2021-03-03/983637921461739.png' />

<img src='https://img2.soutiyun.com/ask/2021-03-19/985000729126524.png' />

题10-20图(a)所示均质圆柱，半径为r，质量为m,置圆柱于墙角。初始角速度为w₀，墙面，地面与圆柱接触处的动滑动摩擦因数均为f,滚动阻力不计，试求使圆柱停止转动所需要的时间。 <img src='https://img2.soutiyun.com/ask/2020-12-17/977073774428025.png' />

<img src='https://img2.soutiyun.com/ask/2020-12-17/977087512116776.png' />

题11-5图(a)所示系统由均质圆盘与均质细杆铰接而成。已知圆盘半径为r，质量为M，质量为m。在图示水平位置杆的角速度为w，角加速度为a，圆盘的角速度，角加速度均为零，试求系统惯性力系向定轴O简化的主矢与主矩。 <img src='https://img2.soutiyun.com/ask/2020-12-17/977077564929829.png' />