A simple machine, such as a lever, pulley, or gear train, is "ideal" if the power input is equal to the power output of the device, which means there are no losses. In this case, the mechanical efficiency is 100%.
a simple machine such as a level pulley, or gear train ,is ideal if the power input is equal to the power output of the device ,which means there are no losses.in this case the mechanical efficiency is 100 percent .
