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.

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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

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 %

3 / 10

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

4 / 10

What is the Actual Mechanical Advantage when 300 N of force is required to lift a 3000 N object?

0.1

5 / 10

Joe is attempting to lift a 3000 N motorcycle into a trailer 1.5 meters off the ground using a pulley system. If Joe applies 300 N of force, what is the ideal distance he would pull on his side of the rope?

0.0005 m

15 m

10 m

450

6 / 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

7 / 10

When energy is lost from the system its lost as _______________.

kinetic energy

potential energy

both potential and kinetic energy

heat energy

Heat is not the reason for a cars engine and is a form that mechanical energy is converted to when not going into movement

8 / 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

9 / 10

How much work would a 75 kg student do to climb up a ladder 9 meters?

0 J

675 J

3250 J

6615 J

You must lift your weight as the force when going up

F_w = mg = (75)(9.8) = 735 N

W = Fd = (735)(9) = 6615 J

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

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 / 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 %

3 / 20

What is the Actual Mechanical Advantage when 300 N of force is required to lift a 3000 N object?

0.1

4 / 20

A 460 N box is hoisted above a truck by John who applies 60 N of force. What is the actual mechanical advantage of the pulley system?

0.13

7.67

27600

2760

5 / 20

A 460 N box is hoisted above a truck by John who applies 60 N of force. What is the actual mechanical advantage of the pulley system?

0.13

7.67

27600

2760

6 / 20

John pushes a box up a ramp using a 10 m plank. The box moves a vertical distance of 2 m and weighs 500 N, ideally with how much force must he push?

100 N

0.01 N

10000 N

250 N

7 / 20

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

lever

pulley

incline plane

8 / 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.

9 / 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

10 / 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

11 / 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

12 / 20

When energy is lost from the system its lost as _______________.

kinetic energy

potential energy

both potential and kinetic energy

heat energy

Heat is not the reason for a cars engine and is a form that mechanical energy is converted to when not going into movement

13 / 20

Mechanical Energy is composed of ____________.

kinetic energy

potential energy

both potential and kinetic energy

heat energy

Mechanical energy is composed of potential energy plus kinetic energy. Its the total of the moving and what could be released as moving energy.

ME = KE + PE

14 / 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

15 / 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

16 / 20

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

1.43 J

1715 J

3862 J

6732 J

17 / 20

How much work would a 75 kg student do to climb up a ladder 9 meters?

0 J

675 J

3250 J

6615 J

You must lift your weight as the force when going up

F_w = mg = (75)(9.8) = 735 N

W = Fd = (735)(9) = 6615 J

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 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

20 / 20

How much work is done when a force of 50N forward is applied to move a box 6 meters in the same direction?

0 J

8.3 J

50 J

300 J

W = Fd

W = (50)(6) = 300 J

Your score is

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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