Passage: There are different ways to place a piano in your apartment. The piano movers can use pulleys or inclines or other means to get the piano to your second story apartment. The piano movers you have hired decide to use an incline. The movers have a difficult time because the piano slides back down at times. The 400kg piano slides 2m down a 30 incline and is kept from speeding further by one of the men who is pushing back on it. The coefficient of friction is 0.40. Sample Questions: 1. Calculate the force exerted by the man. a. 600 N b. 800 N C. 24000 N d. 12000 N 2. Calculate the work done by the man on the piano. a. -1200 J b. -1600 J C. -4800 J d. -2400 J 3. Calculate the work done by the friction force. a. -1200 J b. -1600 J C. -2716J d. -6790 J