A 250gram cart is traveling along on a horizontal surface at 1.2m/s before it travels down a ramp that is 35cm tall. Let y=o at the bottom of the ramp and assume no energy is lost. A. What is the carts kinetic energy before it goes down the ramp? B. What is the cart's gravitational potential energy before going down the ramp? C. What is the kinetic energy of the cart at the bottom of the ramp? D. How fast is the cart traveling at the bottom of the ramp