<P> Let S be the distance from the axle of the fixed block to the end of the rope, which is A where the input force is applied . Let R be the distance from the axle of the fixed block to the axle of the moving block, which is B where the load is applied . </P> <P> The total length of the rope L can be written as </P> <Dl> <Dd> L = 2 R + S + K, (\ displaystyle L = 2R + S + K, \!) </Dd> </Dl> <Dd> L = 2 R + S + K, (\ displaystyle L = 2R + S + K, \!) </Dd>

How to find mechanical advantage of a lever