A shopping cart (initially at rest) with a mass of 45.0kg is released at a height of 4.2m at the top of the store's entrance ramp. What is the cart's velocity at the
bottom of the ramp? Don't forget units!

Will you chech and finish these for me, because i am stumped with them.

Which of the following are appropriate acceleration units?

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?