r 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