首发于费曼物理学讲义练习集个人解析 切换模式写文章 登录/注册费曼讲义练习集个人解析(第二章) LUMEN 物理6 人赞同了该文章 2.1. Use the principle of virtual work to establish the formula for an unequal arm balance, as shown in the figure, W1l1=W2l2. 2.2. Extend the formula in 2.1 to ...