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处于平衡状态的杠杆,当受外界因素的影响(如作用在杠杆上的力或力臂发生变化)时,此杠杆能否再次平衡?这样的问题按常规方法来分析,判断比较繁杂.如果运用夸张法来分析,就显得简单多了.下面举例来说明.例1如图1所示的轻质杠杆,AO小于BO.在A、B两端悬挂重物G1和G2后杠杆平衡.若将
When a lever is in equilibrium, when it is affected by external factors (such as the force acting on the lever or the arm is changed), can this lever be balanced again? This kind of problem is analyzed according to the conventional method and the judgment is relatively complicated. Exaggeration method to analyze, it seems more simple. The following example to illustrate. Example 1 as shown in Figure 1 lightweight lever, AO is less than the BO. At both ends of the A, B hanging weights G1 and G2 after the lever balance.