A ramp of mass M is at rest on a horizontal surface. A small cart of mass m is placed at the top of the ramp and released. What are the velocities of the ramp and the cart relative to the ground at the instant the cart leaves the ramp? (Assume the positive direction is to the right. Indicate the direction with the signs of your answers. Use the following as necessary: M, m, g, and h. vcart = vramp =