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在实际应用中,为了既可以改变力的方向,又可以省更多的力,人们常常把定滑轮和动滑轮组合在一起,组成滑轮组使用.在组装滑轮组时,首先要根据题意确定承担重物的绳子段数n,确定滑轮组的绕线方法.初中阶段,我们主要学习和掌握由一个定滑轮和一个动滑轮组成的滑轮组的绕线方法:如果拉力的方向向上,则由3根绳子承担重物,绳子的起始端在动滑轮上:如果拉力的
In practice, in order to both change the direction of force, but also save more force, people often put the fixed pulley and moving pulley together to form a pulley group used in the assembly pulley group, we must first determine the load bearing Junior high school, we mainly learn and master the winding method of a pulley block consisting of a fixed pulley and a movable pulley: if the direction of the pulling force is up, the three ropes will bear the heavy load, The beginning of the rope on the moving pulley: If the tension