天气预报 > 其他 > 杠杆原理分为几种
杠杆原理分为几种
更新时间: 2020-10-25 00:00:00  

杠杆可分为省力杠杆、费力杠杆和等臂杠杆,没有任何一种杠杆既省距离又省力。杠杆原理也称为“杠杆平衡条件”。要使杠杆平衡,作用在杠杆上的两个力矩,即力与力臂的乘积大小必须相等。动力臂是阻力臂的几倍,阻力就是动力的几倍。

关键词: 杠杆 原理 分为

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