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November 01, 2025, 09:39:43 am
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Author Topic: Need help-forgotten a key formula  (Read 755 times)  Share 

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lachymm

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Need help-forgotten a key formula
« on: May 26, 2010, 08:52:08 pm »
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How do you find the period of earth orbit around the moon?

I think the formula is something like-? I might be wrong...Because its not working in a question...

Where R = Distance between the centre of earth and the centre of the moon?
M = Mass of the moon
G= Suck a latex... Can do to the power of -11 for some reason

Well tell me if i am using wrong formula or something?
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olly_s15

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Re: Need help-forgotten a key formula
« Reply #1 on: May 26, 2010, 09:08:34 pm »
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M is not the mass of the moon - it is the mass of the central  body that it is orbiting
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qshyrn

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Re: Need help-forgotten a key formula
« Reply #2 on: May 26, 2010, 09:19:21 pm »
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Quote from: lachymm on May 26, 2010, 08:52:08 pm
How do you find the period of earth orbit around the moon?

I think the formula is something like-? I might be wrong...Because its not working in a question...

Where R = Distance between the centre of earth and the centre of the moon?
M = Mass of the moon
G= Suck a latex... Can do to the power of -11 for some reason

Well tell me if i am using wrong formula or something?
u got it right except M is mass of earth as olly said
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lachymm

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Re: Need help-forgotten a key formula
« Reply #3 on: May 27, 2010, 04:14:41 pm »
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It is embarrassing to have 50 for physics in my predicted score :S
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