# Mini-Quiz: Center of Mass Definitions

by Ron Kurtus (revised 31 May 2011)

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

1. If a spherical object had a greater density of mass on one side, how would that affect its CM?

The CM would be shifted toward the more dense area

The CM would remain at the geometric center, since the object is a sphere

The CM would be shifted toward the less dense area

2. For two spheres, if the M = 3m, what would Rm equal?

1/3 of RM

3 times RM

3 plus RM

3. Where is the CM between Earth and a space station in orbit around the Earth?

Close to the center of the space station

Halfway between the Earth and the space station

Close to the center of 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.

Know what words mean

## Resources and references

Ron Kurtus' Credentials

### Websites

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

Center of Mass - Wikipedia

Gravitation Resources

### Books

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.

## Students and researchers

www.school-for-champions.com/science/
mini-quiz_gravitation_center_of_mass_definitions.htm

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