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April 20, 2014

April 20, 2014

Posted by **kelsey** on Thursday, October 30, 2008 at 11:58pm.

(a) Find the orbital period of such a satellite.

hours

(b) Find the orbital speed of such a satellite.

km/s

i cannot find the equation to use for this...please help?

- physics help please!!** -
**drwls**, Friday, October 31, 2008 at 12:31amAdd 4*10^7 m to the radius of the Earth to get the radial distance R from the center of the earth. Call this R.

Solve for the orbital speed V first.

GM/R^2 = V^2/R

G is the universal gravity constant and M is the mass of the earth.

V * P = 2 pi R

(solve for the period P in seconds)

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