# Mini-Quiz: Center of Gravity

by Ron Kurtus (25 August 2010)

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

1. How do you calculate the center of gravity?

Add up the weights and divide by the separations

Add the product of weights and separations and then divide by the total weight

Measure the total weight, multiply times the total separation and divide by two

2. Where do you hang the plumb line when determining the CG?

It doesn't matter, because it always goes through the CG

Only from the corners

From the point where you are suspending the object

3. What happens when you hit a ball outside the bat's center of gravity?

The ball will travel much further

The ball will not go as far as if hit at the CG

The ball will start spinning rapidly

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

Center of gravity and Rotational variables - Boston University Physics

Center of gravity of an aircraft - Wikipedia

Center of Gravity experiment - Exploratorium

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_center.htm

## Where are you now?

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Gravity topics

## Gravitation

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