# Mini-Quiz: Overview of Energy from Gravity

by Ron Kurtus (24 May 2013)

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

1. What happens to the potential energy when an object hits the ground?

It becomes infinity

It does not vary

It becomes zero

2. Why does an object have an initial KE when you project it downward?

It has an initial velocity that causes the KE

No one is certain why that happens

The initial KE helps to compensate a lack of PE

3. What happens at the maximum height when an object is projected upward?

The KE equals the PE

The KE becomes zero and the PE relates to that height

The KE and the PE interchange values

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 and Energy - Exploring the interplay of gravity and mass-energy

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.

## Students and researchers

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

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