# Mini-Quiz: Gravity and Newton's Cannon

by Ron Kurtus (revised 7 March 2011)

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

1. Would Newton's Cannon have similar results on the Moon?

No, because the Moon has no gravity

It depends if a rocket could bring a cannon up to the Moon

Yes, except you use different values of g and R

2. How would Newton increase the radius of the circular orbit?

Shoot the cannonball from a higher mountain

Shoot the cannonball straight up

There is only one possible radius

3. How could a cannonball possibly fly off into space?

Newton had some magical powers

This is a thought experiment that follows laws of Physics

A very small cannonball would be necessary

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.

Imagination is great

## Resources and references

Ron Kurtus' Credentials

### Websites

Gravity Resources

Newton's Cannonball and the Speed of Orbiting Objects - Bucknell University Physics

Newton's cannonball - Wikipedia

Interactive Demonstration of Newton's Cannon

## Questions and comments

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