a person pulling down on the long arm to raise a bucket of water, many times his or her own weight, attached to the short arm. The simplest lever is a crowbar, a long pole of wood or metal. One end of a crowbar is pried under the object to be lifted, and a solid block is slid under the bar, close to that end. The point, around which the bar turns, in this case the block is called a Fulcrum. Pushing down with a small force on the far end of the lever causes the bar to rotate on the fulcrum, exerting a much greater force at the short end. The distance that each end moves is proportional to the length of the bar from that end to the fulcrum.