(a) What is the speed of a 217 kg satellite in an approximately circular orbit 6

Question

(a) What is the speed of a 217 kg satellite in an approximately circular orbit 643 km above the surface of Earth?

(b) What is the period?

I got parts A and B, to be 7570 m/s and 97 min respectively, but do not know how to proceed for c and below

(c) Suppose the satellite loses mechanical energy at the average rate of 1.2 105 J per orbital revolution. Adopt the reasonable approximation that the trajectory is a "circle of slowly diminishing radius". Determing the altitude at the end of its 1600th revolution.

(d) Determine the speed at the end of its 1600th revolution.

(e) Determine the period at the end of its 1600th revolution.

(f) What is the magnitude of the average retarding force during this revolution?

Explanation / Answer

Here :) It's the same problem, but with different numbers.

http://answers.yahoo.com/question/index?qid=20090417121808AAYaWxP

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