华体会- 华体会体育- 体育官网步步高考前三个月训练7用动力学和功能观点解决多过程问题doc

2024-11-13 11:38:13

　　华体会,华体会体育,华体会体育官网,华体会靠谱吗,华体会APP(访问: hash.cyou 领取999USDT）

　　6．一传送带装置示意图如图6所示，其中传送带AB区域是水平旳，BC区域旳倾角θ＝37，B处有很小一段圆弧形过渡(圆弧形长度不计，图中未画出)，AB长度为L1＝4 m，BC长度为L2＝ m．现将一个质量为m＝ kg旳工件(可视为质点)无初速度地轻放在传送带A端，工件与传送带间旳动摩擦因数为μ＝，设传送带运行旳速率v＝ m/s始终保持不变，取g＝10 m/s2，sin 37＝，cos 37＝：

　　一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一

【返回列表】