# Energy_ Work_ Power_ and Energy Worksheet Answers

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```					 Energy, Work, Power, and
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
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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