A cart with a mass of 0.5 kg is at the top of the ramp. The height is 0.40m .

A) what’s the carts GPE (Gravitational Potential Energy) at the top of the ramp?

B) If the cart is allowed to roll down the ramp freely, what would be its kinetic energy at the bottom of the ramp?

C) what would be the carts velocity at the bottom of the ramp?

D) How muck work would be required to pull the cart back to the top of the ramp?