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Energy_ Work_ Power_ and Energy Worksheet Answers

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					 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.

				
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