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近年来,各类考试经常涉及“画杠杆中最小动力”的问题.通过杠杆内容的学习,同学们已经知道了当杠杆处于平衡状态时符合其平衡条件,即F.l1=F.l2.那么我们该怎样运用此原理作出杠杆中的最小动力呢?下面就此类问题做一下探讨.由杠杆的平衡条件F.l1=F.l2可知,在杠杆中的阻力、阻力臂一定的情况下,要使动力最小,必须使动力臂最长.而在通常情
In recent years, all kinds of examinations often involve the problem of “drawing the least force in the lever.” Through the study of the lever content, the students already know that when the lever is in balance, the condition of equilibrium is satisfied, that is, F.l1 = F.l2 . So how do we use this principle to make the least leverage in the lever? Here’s a discussion of such problems. By the lever equilibrium conditions F.l1 = F.l2 we can see that in the lever resistance, resistance arm under certain circumstances To minimize power, the boom must be longest, while in normal conditions