A student applies a force to a cart to pull it up an inclined plane raised to 30 degrees above the horizontal at constant speed during a physics lab. A force of 20.8 N is applied parallel to the incline to lift a 3.00-kg loaded cart to a height of 0.450 m along an incline which is 0.636-m long. (4 pts) Determine the work done upon the cart Determine the potential energy change of the cart.