iii. A 0.030-kg bullet is fired vertically at 200 m/s into a 0.15- kg baseball that is initially at rest. How high does the combined bullet and baseball rise after the collision, assuming the bullet embeds itself in the ball?

iv. Imagine that a 60.0 kg person is standing on a 40.0 kg cart, as shown in the diagram. Also on the cart are six boxes, each with a mass of 10.0 kg. The cart is initially at rest. The person then throws the boxes backwards at a rate of one box every six seconds, at 5.0 m/srelative to the cart. Determine the net force acting on the cart.