Jay rides his 2.0-kg skateboard. He is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. The board now goes forward at 13 m/s.
A. Determine Jay’s mass.
B. Determine the change in the internal energy of the system during this process.
(Express your answer to two significant figures and include the appropriate units.)
a. momentum = mass x velocity b. kinetic energy = 1/2 x mass x velocity^2 Although total momentum is conserved, total kinetic energy is not necessarily equal. It’s because Jay acted a force on the skateboard and increased the energy of the system.
