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Mini-Quiz: Relationship between Work and Mechanical Energy

by Ron Kurtus

Take this Mini-Quiz to check your understanding of the lesson material.

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1. If the work done to move a 2 kg object 1 m was 10 J, how much would the force be?

F = W/d = 10/1 = 10 N

F = ma = 2 * 10 = 20 N

There is not enough information to solve the problem

2. If a 2 kg object moved horizontally at a constant velocity of 5 m/s for 3 m, how much work would be done?

75 J

30 J

No work would be done, since ΔKE = 0

3. How much work would be required to compress a spring from PE = 0 to PE = 0.5 J?

Springs don't have potential energy

0.5 J

50 J

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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It takes energy to do good work

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Resources and references

Ron Kurtus' Credentials

Websites

Work: the transfer of mechanical energy - From online physics book by Benjamin Crowell

Definition and Mathematics of Work - Physics Classroom

Work (Physics) - Wikipedia

Work, Energy, and Power - HyperPhysics

Physics Resources

Books

(Notice: The School for Champions may earn commissions from book purchases)

Top-rated books on Physics of Work

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Students and researchers

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mini-quiz_work_energy.htm

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Where are you now?

School for Champions

Physics topics

Mini-Quiz: Relationship between Work and Mechanical Energy

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Force topics

• Overview of Study of Force

Basics

• Units of Force
• Force Vectors
• -- Force Vectors in Hitting a Golf Ball
• Pressure is Force per Unit Area

Applied force

• Applied Force
• Applied Force Affects Motion
• Torque is a Rotational Force
• Mysterious Force at a Distance
• -- Fundamental Forces Act at a Distance
• -- Force of Gravity
• -- Gravitation
• Centripetal Force

Resistive force

• Resistive Force
• Resistive Force of Friction

Inertial force

• Inertial Force
• Centrifugal Force Caused by Inertia

Work and Force

• Work is a Result of Force
• Relationship between Work and Energy
• Work Can be Change in Kinetic Energy

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