Energy, Work, Power, and Energy Worksheet Answers Part 1: Work and Power 1. Amy uses 20-N of force to push a lawn mower 10meters. How much work does she do? Part 1: Work and Power 2. Frank does 2400-J of work in climbing a set of stairs. If he does the work in 6 seconds, what is his power output? Part 1: Work and Power 3. A girl weighing 420 Newtons takes 55 seconds to climb a flight of stairs 18 meters high. What is her power output vertically? Part 1: Work and Power 4. How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200-N? Part 1: Work and Power 5. A 40 N force is used to push a 2.00 kg cart a distance of 5 meters. What is the work done on the cart? Part 1: Work and Power 6. A 900-N mountain climber scales a 100 meter cliff. How much work is done by the mountain climber? Part 1: Work and Power 7. A small motor does applies a 200N force over 10m in 20 seconds. What is the power of the motor in watts? Part 2: Machines and Mechanical Advantage 1. 2. 3. Part 3: Torque The drawing to the above represents a wrench. The left end of the wrench is attached to a bolt. Four equal forces of 100N are applied as indicated in the drawing. A. If a 100N force would cause the most torque if it was placed at which letter above? (Why) B. What is the torque at A C. What is the torque at C 4. What is the boy weight in order for the see-saw to be in equilibrium? 5. How far is the boy from the fulcrum in the see-saw in equilibrium below? Part 4: Mechanical Energy 1. 2. 3. 4. 5. 6.