# Mini-Quiz: Potential Energy of Gravity

by Ron Kurtus (revised 21 January 2011)

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

1. When an object is dropped from 5 m, what is its PE at 3 m?

PE = 5mg J

PE = 3mg J

PE = 0 J

2. When you project a 2 kg object downward, at 4 m/s, what is its initial KE?

KEi = 16 J

KEi = 8 J

KEi = PEi

3. Does a dropped object have a greater final velocity than one that is projected upward?

Yes, because the object projected upward goes in the opposite direction

They have the same final velocity if the mass is the same

No, because the object projected upward falls from a greater distance

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.

## Resources and references

Ron Kurtus' Credentials

### Websites

Gravity and Potential Energy - University of Alaska

Potential Energy Calculator

Gravity 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.

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

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