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Solution of Question 4
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Topic: Solution of Question 4 (Read 3782 times)
Chaojie Li
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Solution of Question 4
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on:
March 19, 2015, 09:13:07 PM »
Using Newton shell theorem (see [Section 6 of Lecture 25]) prove that if Earth was a homogeneous solid ball then the gravity pull inside of it would be proportional to the distance to the center.
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Last Edit: March 20, 2015, 08:13:53 AM by Victor Ivrii
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Chaojie Li
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Re: Solution of Question 4
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March 19, 2015, 09:14:32 PM »
Q4 reloading
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Victor Ivrii
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Re: Solution of Question 4
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Reply #2 on:
March 20, 2015, 08:17:36 AM »
Yes exactly: if you drill a tunnel and drop a ball it will be a harmonic oscillations $r'' = - kr $ with $k= g/R$.
Don't try this
at home
on our planet!
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Solution of Question 4