The more help you have, the lighter the load seems to be. A compound pulley, also called a block and tackle, is a combination of a fixed and a movable pulley. This type of pulley changes direction, and yields a gain in force at the same time. The simple machines all require human energy in order to work. For example, when you push on the locomotive in the Museum, you actually are not doing work, because you cannot move it.
Work consists of two parts.
The other is the distance over which the force is applied. Force X Distance. Work is measured in joules. Force is the pull or the push on an object, resulting in its movement. Force is measured in newtons.