Mini-Quiz of Overview of the Force of Gravity by Ron Kurtus - Succeed in Understanding Physics. Key words: physical science, Isaac Newton, Universal Gravitation, acceleration, mass, weight, Earth, Moon, planets, Sun, School for Champions. Copyright © Restrictions

# Mini-Quiz: Overview of the Force of Gravity

by Ron Kurtus (revised 2 September 2010)

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

1. What is required for the gravity equation to apply?

There are no requirements, and it always applies

Objects must be relatively close to the Earth

There must be no air resistance

2. Does a piece of tissue and a ball fall at the same rate?

Yes, because everything falls at the same rate

Scientists aren't sure, because it has never been tried before

No, because air resistance slows down the tissue

3. Why would an object fall slower on the Moon?

Because the acceleration due to gravity on the Moon is less than on Earth

It would actually fall faster because there is no air resistance

Gravity from the Earth would slow it down

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.

Look toward the future

## Resources and references

Ron Kurtus' Credentials

### Websites

Gravity Resources

Force of Gravity - Universe Today Magazine

Earth's gravity - Wikipedia

How does gravity work? - How Stuff Works

Standard gravity - Average value, as compared to variation due to position on Earth - Wikipedia

International Gravity Formula - Variation of gravity with distance from equator - Geophysics dept. University of Oklahoma

I feel 'lighter' when up a mountain but am I? - National Physics Laboratory FAQ

### 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.htm

## Where are you now?

School for Champions

Gravity and Gravitation topics

## Gravitation

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