Moon in Orbit

  • Thread starter Naeem
  • Start date
  • #1
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Q.Suppose the moon were held in its orbit not by gravity but by the tension in a massless cable. You are given that the period of the moon's orbit is T = 27.3 days, the mean distance from the earth to the moon is R = 3.85 x 108 m, and the mass of the moon is M = 7.35 x 1022 kg.
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What would the tension in the cable be?

'T' in Newtons.

My idea:

T = Ma
mass of the moon is given to us.

a = v^2 /R

To find v , we can v = 2 pi /T

Radius is also given to us.

We can convert the 27.3 days to seconds, by 23.7 * 24 hours * 3600 seconds.

Well is my approach correct.
 

Answers and Replies

  • #2
quasar987
Science Advisor
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Hi Naeem,

this looks purfect to me.
 

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