024圆周运动之传动模型 精讲精练-2022届高三物理一轮复习疑难突破微专题
023水平面和斜面上的圆周运动(转盘模型)及其临界问题一.必备知识1.常见的三种传动方式及特点(1)皮带传动:如图甲、乙所示,皮带与两轮之间无相对滑动时,两轮边缘线速度大小相等,即vA=vB。(2)摩擦(齿轮)传动:如图丙所示,两轮边缘接触,接触点无打滑现象时,两轮边缘线速度大小相等,即vA=vB。(3)同轴转动:如图丁所示,两轮固定在一起绕同一转轴转动,两轮转动的角速度大小相等,即ωA=ωB。2.解决传动问题的关键(1)确定属于哪类传动方式,抓住传动装置的特点。①同轴转动:固定在一起共轴转动的物体上各点角速度相同;②皮带传动、齿轮传动和摩擦传动:齿轮传动和不打滑的摩擦(皮带)传动的两轮边缘上...
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