1. You push a 180 kg shopping cart with an acceleration of 1.05 m/s? over a distance of 2.75 m over level ground. a. Find the work you do on the shopping cart. b. Find the work done by the gravity on the cart. C. Explain answer to part (b). 2. In a game of volleyball, a server strikes the ball with an overhand serve. A. Does the server do positive or negative work on the ball? The ball unfortunately hits the net and comes to a stop before falling to the ground. B. Does the net do positive or negative work on the ball