You serve a basketball with a mass of 5 kg. If the ball leaves your hand at 30 m/s what is the kinetic energy?
A) 150 joules
B) 2,250 joules
C) 75 joules

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?