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# Mini-Quiz: Torque is a Rotational Force

by Ron Kurtus (revised 31 October 2015)

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

1. What happens to the torque if the moment arm is increased?

The torque decreases with the length of the arm

Nothing happens since torque is independent of distance

The torque increases with the length of the arm

2. What is the torque at a bolt from a force of 5 pounds on a 1-foot wrench?

5 foot-pounds

1/5 foot-pound

0.5 foot-pounds

3. If an electric motor turns a wheel shaft with a torque of 2 N-m, what is the force at the edge of a wheel 1 meter in diameter?

2 N-m / 1 m = 2 newtons

2 N-m / 0.5 m = 4 newtons

2 N-m * 1 m = 2

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.

Consider the direction of a force in your life

## Resources and references

Ron Kurtus' Credentials

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Physics Resources

### Books

The Science of Forces by Steve Parker; Heinemann (2005) \$29.29 - Projects with experiments with forces and machines

Glencoe Science: Motion, Forces, and Energy, by McGraw-Hill; Glencoe/McGraw-Hill (2001) \$19.32 - Student edition (Hardcover)

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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mini-quiz_force_torque.htm

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