Free Printable 4th Period: Quiz A: Work, Power, and Horsepower

1.

A student applies a force in order to lift her backpack from the floor to put on her back about 1.3 meters above the floor. The best explanation for this is:

a)

Work

b)

Power

c)

Energy

d)

Force

2.

In which of these cases is work being done?

a)

A student sleeps calmly on a bed

b)

A student pushes a locked door that does not move

c)

a student lifts and then carries his chair into another room

d)

A student sits on the carpet

3.

What is the unit used to measure Power?

a)

Joule

b)

Watt

c)

Newton

d)

Pascal

4.

A kid applies a force of 70 N to a ball over 2 meters. How much work did he do on the ball? (W=F x d)

a)

140 J

b)

35 J

c)

14 J

d)

7 J

5.

Student A does the same work as Student B but in less time. What can be said about Student A?

a)

He is more powerful

b)

He is less powerful

c)

He has the same amount power

d)

He actually did MORE work than student B

6.

Based on the picture, at which point is potential energy at its greatest?

a)

1 and 5

b)

2 and 4

c)

3 only

d)

Everywhere has the same PE

7.

Based on the picture, at which point is kinetic energy the greatest?

a)

1 and 5

b)

2 and 4

c)

3 only

d)

All locations have the same KE

8.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

9.

Which ball has the greatest MECHANICAL energy? Assume friction is negligible.

a)

A

b)

C

c)

D

d)

F

e)

The ball has the SAME mechanical energy at all locations

10.

A student applies a force of 20 Newtons for 5 seconds over 8 meters. How much work was done? $W=F\ x\ d$

a)

160 joules

b)

100 joules

c)

32 joules

d)

8 joules

11.

A 60 kg student walks up 5 stairwells (each stairwell is 4 m) in 20 seconds. Which of the following is FALSE? $W=mgd\ \ \ \ \ \ \ P=\frac{W}{t}\ \ \ \ \ 1HP=746\ watts$

a)

The student did work against gravity

b)

The student did 12,000 joules of work

c)

The student has 600 watts of power

d)

The student has over 0.9 HP (90% of 1 HP)

12.

A student walks, jogs, and runs up a stairwell. Which of the following is TRUE?

a)

The student does more work when running up the stairs.

b)

The student has the greatest power running up the stairs.

c)

The student does the same work and has the same power in each situation

d)

The student must have more than 746 watts of power (1HP)

13.

A 2 kg ball is at a height of 2 meters above the ground on Earth. Which of the following is TRUE? $PE=mgh\ \ \ \ \ \ \ KE=\frac{1}{2}mv^2\$

a)

The ball has 4 joules of PE at the 2 meter height

b)

The ball has gravitational PE at the instant it hits the floor after being dropped

c)

The ball has 40 joules of KE the instant it hits the floor after being dropped

d)

The ball is all KE at the 2 meter height above the ground

14.

A student jumps from a cliff from some height into water. What must the student do in order to have gravitational Potential Energy again? $PE=mgh\ \ \ \ \ KE=\frac{1}{2\ }mv^2\ \ \ \ W=F\ x\ d$

a)

They must do work against gravity

b)

They must be moving through the air during their fall

c)

They must be accelerating toward the Earth

d)

They must have energy

15.

A student drops a ball from 1 meter (100 cm) height. It bounces up to 80 centimeters (0.8 m). Which of the following is TRUE? $Efficiency\ =\ \frac{\text{Rebound Height - Drop Height}}{\text{Drop Height}}\ x\ 100$

a)

The total PE at the beginning is the same as the PE after the bounce

b)

The total PE after the bounce is less due some of the energy changing into other forms; it retained 80% of its original drop height

c)

After the bounce, the ball must have more PE than it did before it was dropped

d)

The ball maintained 20% of its total PE from its original drop height

4th Period: Quiz A: Work, Power, and Horsepower

Total questions: 15

Worksheet time: 20mins

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