# Mini-Quiz: Escape Velocity from Gravity

by Ron Kurtus (revised 16 May 2011)

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

1. Why is it sometimes called surface escape velocity?

Because it is the attained velocity at or near the surface

To avoid confusion with underwater escape velocity

No one is sure where the expression came from

2. Why is the escape velocity of the Moon so much less than the Earth's?

Because the Moon is so far from the Earth

Because the gravity and radius of the Moon are much less than the Earth's

The escape velocity from the Moon is actually higher than from Earth

3. What might happen if a rocket blasted off at the gravity escape velocity from the Earth?

The rocket exterior might burn up before it left the atmosphere

The rocket would only make it to the Moon

The rocket would go into space and never come back

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.

A good vocabulary is important

## Resources and references

Ron Kurtus' Credentials

### Websites

Gravity Resources

What is escape velocity? - From PhysLink

Escape Velocity - From Wikipedia

Physics Resources

### Books

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

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