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Mini-Quiz: Relative Motion and Center of Mass

by Ron Kurtus (14 May 2011)

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



1. If you see two objects in space moving in the same direction and parallel to each, how is the CM between them moving?

The CM is stationary, since the objects are moving together

The CM rotates on its axis

It is moving along with them in the same direction

2. If an object is moving toward the stationary CM, how does the other object mirror the motion?

It moves away from the CM at the same speed

It also moves toward the CM but in the opposite direction

It depends on how fast the CM is moving

3. Why would you view the motion of one object with respect to the other?

It may be a more convenient perspective

You would never view one object with respect to the other

You always do this when on the Earth

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.


Be strong


Resources and references

Ron Kurtus' Credentials

Websites

Center of Mass Calculator - Univ. of Tennessee - Knoxville (Java applet)

Center of Mass - Wikipedia

Gravitation Resources

Books

Top-rated books on Gravity

Top-rated books on Gravitation


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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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