Work Power and Energy Physics Practice

Work, Power, and Energy Physics Practice

Get the work, power, and energy physics practice you need for your test. Generate 10 and 20 question quizzes here and find other useful practice.

Find a direct link to the work and power section, the simple machine s, or energy section of the equation sheet or click below for the entire equation sheet.

Physics Equation Sheet

Random 10 Questions from the Work, Power, and Energy Test Bank

10 Work Power and Mechanical Energy Questions

1 / 10

Tom pushes a 50 kg box up a 15 meter incline plane by pushing with a force of 100 N. The end result is that the box was lifted 2 meters. What was the efficiency of this simple machine?

32.1%

66.7%

73.1 %

32 %

2 / 10

When energy is lost from a simple machine which of the following must be less

work output

work input

distance output

force output

You cannot create work or energy. In a perfect (ideal) scenario W_in = W_out but it’s impossible for W_outto be more. In real situations W_outis less because heat is lost.

3 / 10

Simple machines can't be used to multiply _________________.

Force

Distance

Energy

You cannot create work or energy. In a perfect (ideal) scenario W_in = W_out but it’s impossible for W_outto be more. Since W=(F)(d) you create the equation (F_in)(d_in)=(F_out)(d_out). This last equation shows how you can multiply force or distance

4 / 10

What happens to potential energy as an object falls under ideal conditions?

It increases

It decreases

It stays the same

Mechanical energy stays the same as potential energy gets converted to kinetic energy

Mechanical Energy (PE + KE) stays the same

Potential energy goes down

Kinetic energy goes up

5 / 10

How much does kinetic energy change when the velocity of an object doubles?

0 times

2 times

4 times

1/2 times

1/4 times

6 / 10

How much kinetic energy does a 30 kg boar have when running 6 m/s?

90 J

540 J

1800 J

5 J

7 / 10

Sergio pushed a box with 50 Newtons of force forward. When it did not move he pushed the box even harder with 100 Newtons of force but the box still did not move. When did Sergio do more work?

When he pushed with a force of 50 N

When he pushed with a force of 100 N

Neither

W = Fd

If you do not move the object, you have done no work no matter how much force you apply

8 / 10

What is the unit of power?

Watt is the unit of power which is a Joule per second W = F/d

9 / 10

What is the unit of work?

The joule is the unit of work and all of the energies (ME, KE, PE, Heat)

10 / 10

What is the power output when it takes a force of 50N forward is applied to move a box 6 meters in the same direction in 6 seconds?

0 W

8.3 W

50 W

300 W

Your score is

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Random 20 Questions from the Work, Power, and Energy Test Bank

20 Work Power and Mechanical Energy Questions

1 / 20

What is the efficiency of 4 meters ramp used to lift a 1400 N sled full of toys 1 meter off the ground pushing with a force of 500 N?

110 %

45 %

70 %

62 %

2 / 20

What is the ideal mechanical advantage when a ramp of 4 meters is used to lift a 1400 N sled full of toys 1 meter off the ground pushing with a force of 500 N?

350

3 / 20

The picture above is of a(n) ___________________.

lever

pulley

incline plane

4 / 20

Which is a simple machine consisting of a bar or plank that turns around a pivot point?

lever

pulley

incline plane

5 / 20

When energy is lost from a simple machine which of the following must be less

work output

work input

distance output

force output

You cannot create work or energy. In a perfect (ideal) scenario W_in = W_out but it’s impossible for W_outto be more. In real situations W_outis less because heat is lost.

6 / 20

Simple machines can't be used to multiply _________________.

Force

Distance

Energy

7 / 20

What happens to potential energy as an object falls under ideal conditions?

It increases

It decreases

It stays the same

Mechanical energy stays the same as potential energy gets converted to kinetic energy

Mechanical Energy (PE + KE) stays the same

Potential energy goes down

Kinetic energy goes up

8 / 20

What happens to kinetic energy as an object falls under ideal conditions?

It increases

It decreases

It stays the same

Mechanical energy stays the same as potential energy gets converted to kinetic energy

Mechanical Energy (PE + KE) stays the same

Potential energy goes down

Kinetic energy goes up

9 / 20

A pool ball is flung off of a 0.68 m high table and the ball hits the floor with a speed of 6.0 m/s. How fast was the ball moving when it left the pool table?

3.23 m/s

4.76 m/s

6.34 m/s

22.31 m/s

10 / 20

If a car has a mass of 750 kg, how much force is required to stop the car if it was traveling 12.5 m/s and took 10 m to stop?

2434 N

5859 N

12230 N

1460 N

11 / 20

Potential energy is dependent on __________________.

location

motion

heat

Location or height which is a type of location

how far you pull the a bow back or how high you lift an object

See types of distance and height in the equations below

Potential energy is equal to the work done, force applied over a distance, to store it (PE = Fd)

Gravitational potential energy is equal to its weight (mass times gravity) lifted a height to store it (GPE = mgh)

12 / 20

How much does kinetic energy change when the velocity of an object doubles?

0 times

2 times

4 times

1/2 times

1/4 times

13 / 20

How much more potential energy do you have when an object is five times higher?

1/5 times

2 times

5 times

25 times

14 / 20

How much potential energy does a 568 N ballerina have when she leaped 0.35 meters off the ground?

6.3 J

20 J

199 J

1990 J

GPE = mgh or GPE = F_wh

you are given weight not mass so use this form:

GPE = F_wh = (568)(0.35) = 198.8 J

GPE = mgh or GPE = F_wh

You are given weight not mass so use this form:

GPE = mgh = (50)(3.5) = 175 J

15 / 20

How much potential energy is in a 50kg boulder 3.5m off the ground?

1.43 J

1715 J

3862 J

6732 J

16 / 20

Sergio pushed a box with 50 Newtons of force forward. When it did not move he pushed the box even harder with 100 Newtons of force but the box still did not move. When did Sergio do more work?

When he pushed with a force of 50 N

When he pushed with a force of 100 N

Neither

W = Fd

If you do not move the object, you have done no work no matter how much force you apply

17 / 20

How much work would you have done if you pushed on a 2100 kg car with a force of 210N that did not move?

0 J

10 J

3250 J

441000 J

W = Fd

You have to move the object in the direction of force to do work. No work is done if the object does not move.

18 / 20

A student lifts a physics book applying a force equal to is 10N weight a distance of 3m up. How much work did the student do on the book?

0 J

3.3 J

30 J

3000 J

Work equals force times distance (W = Fd) and the force is the weight of the book that is lifted up

W = Fd = (10)(3) = 20 N

19 / 20

What is the unit of power?

Watt is the unit of power which is a Joule per second W = F/d

20 / 20

What is the power output when it takes a force of 50N forward is applied to move a box 6 meters in the same direction in 6 seconds?

0 W

8.3 W

50 W

300 W

Your score is

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Resources

StickMan Physics Home Page
Work, Power, and Energy Content Page
Stickman Physics Table of Contents: Use the search bar or click here to easily find a unit or topic
Physics Equation Sheet: commonly used equations, variables, and units
Rule of Ones: analyzing equations to determine how other variables change
Holdensclass.com: Video walk-through of Many Physics Concepts