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Mini-Quiz: Relationship between Work and Mechanical Energy

by Ron Kurtus (revised 19 January 2015)

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



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.


It takes energy to do good work


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

Top-rated books on Physics of Work


Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.


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