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Mini-Quiz: Direction Convention for Gravitational Motion

by Ron Kurtus (revised 15 May 2011)

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



1. Why are the direction conventions for gravity and gravitation equations similar?

It is a strange coincidence

Gravity is an approximation of gravitation

They are only similar when the masses of the objects are the same

2. Why is the larger object used as a frame-of-reference?

Because the larger object has no center of mass

Smaller objects move faster than larger objects

You usually consider small objects orbiting larger objects

3. When is a velocity in a negative direction?

When the velocity is moving toward the larger object

When the velocity is in a circle

When the velocity is moving away from the larger object

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.


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