I One 50.0 kg cart is lifted straight up 9.0 m above the ground. An identical cart' is pulled up a ramp tilted upward at 30.00 until it also is 9.0m above the ground. a. Explain which cart has the greater gravitational potential energy. . b. Both carts are released to act under the inuence of gravity. There is no drag in the air or friction on the ramp. Just before reaching the bottom (y = 0 in both cases) which cart is moving fastest? Explain your