已知均质岩坡的 https://assets.asklib.com/images/image2/2018072017433220750.jpg ，问当岩坡高度为200m时，坡角应当采用多少度？

A . 850 B . 800 C . 750 D . 700

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 . A.55° B . 63° C . 70° D . 75°

A . 正确 B . 错误

A . 边坡角 B . 岩体强度 C . 边坡高度 D . 岩坡内的结构面和软弱夹层

A . （1／2）mv B . （3／2）mv C . （3／4）mv D . （1／4）mv

A . A.7.4m B . 9.4m C . 10.5m D . 12m

A . ['https://assets.asklib.com/psource/2015110209573370682.png ，顺时针转向B . Ho＝mR2w，顺时针转向C . Ho＝2mR2w，顺时针转向D .https://assets.asklib.com/psource/2015110209573610129.png ，顺时针转向

A . ＞45°时 B . ＞60°时 C . ＞75°时 D . 90°时

A . 正确 B . 错误 C . 无所谓

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

A . 结构面和软弱夹层的产状与位置 B . 当地的地震设防等级 C . 地下水位 D . 岩体中微小裂隙的发育程度

A .https://assets.asklib.com/psource/2015103015011715312.jpg B .https://assets.asklib.com/psource/2015103015012810244.jpg C .https://assets.asklib.com/psource/2015103015014041530.jpg D .https://assets.asklib.com/psource/2015103015015453297.jpg

<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' />

A．<img src='https://img2.soutiyun.com/shangxueba/ask/1989001-1992000/1990848/ct_jgzjgysm_jgzjgyschoose_00179(20093)2.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/1989001-1992000/1990848/ct_jgzjgysm_jgzjgyschoose_00179(20093)3.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/1989001-1992000/1990848/ct_jgzjgysm_jgzjgyschoose_00179(20093)4.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/1989001-1992000/1990848/ct_jgzjgysm_jgzjgyschoose_00179(20093)5.jpg' />

已知：轮O的半径为R₁，质量为m₁，质量分布在轮缘上；均质轮C的半径为R₂，质量为m₂，与斜面纯滚动，初始静止。斜面倾角为θ，轮O受到常力偶M驱动。求：轮心C走过路程s时的速度和加速度。 <img src='https://img2.soutiyun.com/shangxueba/ask/17853001-17856000/17853528/2017032916584678382.jpg' />

<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

<img src='https://img2.soutiyun.com/ask/2020-05-14/958304031107654.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' />

题11-27图(a)所示，AB，BC为长度相等，质量不等的两均质杆，已知从图示位置φ=30°，β= 60°无初速地开始运动时，BC杆中点M的加速度与铅垂线的夹角为θ=30°，试求两杆质量之比。 <img src='https://img2.soutiyun.com/ask/2020-12-17/977084472010892.png' />