Force and Orbit Speed

  • Thread starter Bjarne
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  • #1
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http://www.science27.com/forum/coworbit.jpg [Broken]

How much relative stronger force would it require to keep a bull in orbit when the radius was 4 times shorter.

And how can this are calculated...?

(The bull only wants to move straight ahead , weight and speed is the same)


4 times ?
2 times ?
8 times ?
Or ?
 
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Answers and Replies

  • #2
52
1
http://www.science27.com/forum/coworbit.jpg [Broken]

How much relative stronger force would it require to keep a bull in orbit when the radius was 4 times shorter.

And how can this are calculated...?

(The bull only wants to move straight ahead , weight and speed is the same)


4 times ?
2 times ?
8 times ?
Or ?

You would need to use the centripetal force equation. If the radius was four times smaller, the force needed to keep the bull in orbit would be << answer deleted by berkeman >> times bigger.
 
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  • #3
berkeman
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http://www.science27.com/forum/coworbit.jpg [Broken]

How much relative stronger force would it require to keep a bull in orbit when the radius was 4 times shorter.

And how can this are calculated...?

(The bull only wants to move straight ahead , weight and speed is the same)


4 times ?
2 times ?
8 times ?
Or ?

Use the equations for centripital force. You can read about them here:

http://en.wikipedia.org/wiki/Centripital_force

So based on that wiki page, what do you think the answer is?
 
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  • #4
berkeman
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59,664
9,810
You would need to use the centripetal force equation. If the radius was four times smaller, the force needed to keep the bull in orbit would be << answer deleted by berkeman >> times bigger.

(This is a schoolwork-like question. Please do not give the answer. Thanks.)
 

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