杠杆平衡问题是物理的重点内容之一,对于原来处于平衡状态的杠杆,当条件改变后,同学们能否立即判断出它还能不能继续保持平衡呢?掌握了下面的方法,那你的答案一定是肯定的.一、力、力臂中有一因素发生改变例1如图1所示,力F1、F2分别作用于杠杆两边(L1L2),杠杆平衡,当F1、F2大 Leverage balance is one of the key elements of physics. For the leverage that was originally in balance, when the conditions change, can the students immediately judge whether it can continue to balance? Master the following method, then your answer Must be affirmative. First, there is a change in force or force arm. Example 1 As shown in Figure 1, forces F1 and F2 act on the sides of the lever (L1L2), respectively, and the lever balances. When F1 and F2 are large