拔河比赛

        第一人拉着从动滑轮轴心引出的绳索，第二人拉着从动滑轮的轮上引出的绳索，两人开始拔河，可以看出第二人很轻松地获得胜利，甚至小孩也可赢得大人，表现出动滑轮可以省力的原理。

Pulling yourself

        The horizonal moving pulley using in tug-of-waring: the first person pulls the rope from the axis derivation,the second person pulls the rope from the moving pulley edge, two people start tug-of-waring, you can see the second people become champion loosely, even a child also can win an adult, expressing the principle of the moving pulley can save energy.