LOOKING BACK Solve the following problems. Show your solution and BOX your nal answer. 1. 2. 3. What is the potential energy of a 5 kg vase on the balcony 2.5 n1 above the ground? A box was pushed with a 9.8 N force, causing it to move by 6 m in the same direction as the force. What is the work done? A baseball pitcher is throwing a fastball. which has a speed (leaving his hand) of 42.0 mfs. The mass of the ball is 0.180 kg. Calculate the work done by the pitcher on the ball. A 0.5 kg ball falls from the top of a building 15.0 m high to the second-floor balcony that is 6.0 n1 above the ground. Find the work done by the gravity on the ball