The document discusses how a lever can be used to lift an elephant. It explains that a lever is a simple machine that rotates around a fulcrum and uses effort and load forces. When the fulcrum is closer to the load, less effort is required. The document then gives an example calculation to determine the length of the rod needed for a man weighing 250N to lift an elephant weighing 50,000N when the fulcrum is 3m from the elephant. Through lever calculations, it is determined the length would need to be 6m.