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**1. Homework Statement**

What is the period, T, of the satellite's orbit (G is the gravitational constant, 6.7 × 10-11 m3 kg-1 s-2) ?

(The picture is attached)http://online.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/oldexams/exam1/sp08/fig18.gif [Broken]

**2. Homework Equations**

a = w^2*r

w=2pi/period

F = -Gm1m2/(R^2)

**3. The Attempt at a Solution**

Using the force equation and "a=F/m",

I got a = GMe/Rs^2

And using a = w^2*Rs,

GMe/Rs^2 = w^2*Rs

Then, the angular velocity keeps having Rs^3 which doesn't seem to be right when compared to the answer...

What's wrong with my attempt?

Please help me out here...

The answer should be "T= 2*pi*Rs/sqrt(GMe)

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