A crane has a cable, under which is attached a hook to lift heavy weights. If the cable is made of steel and is of diameter 1.00 cm, what is the maximum mass that it can lift vertically up, if it is not to stretch by more than 0.20% of its original length

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?