A 1000-lb satellite is placed in a circular orbit 3000 miabove the surface of th

Question

A 1000-lb satellite is placed in a circular orbit 3000 miabove the surface of the earth. At this elevation theacceleration of gravity is 8.03 ft/s2. Knowingthat its orbtal sped is 14,000 mi/h, determine the kinetic energyof the satellite.
Okay, it's clear that to get the answer in the book (6.55E9),one can do: (1/2)*(1000/32.2)*(14000*5280/3600)2. But, then, what is the 8.03 ft/s2 and the 3000 milesused for? A 1000-lb satellite is placed in a circular orbit 3000 miabove the surface of the earth. At this elevation theacceleration of gravity is 8.03 ft/s2. Knowingthat its orbtal sped is 14,000 mi/h, determine the kinetic energyof the satellite.
Okay, it's clear that to get the answer in the book (6.55E9),one can do: (1/2)*(1000/32.2)*(14000*5280/3600)2. But, then, what is the 8.03 ft/s2 and the 3000 milesused for?

Explanation / Answer

You had gotten correct answer and correct way to solve problem! And the 8.03 ft/s^2 and 3000 miles are just a useless values. It isjust simply given for your information. Do not worry aboutthat.

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