(adsbygoogle = window.adsbygoogle || []).push({}); 1. A 100 kg satellite is placed in a circular orbit 3500 km above the surface of earth. At this elevation the acceleration of gravity is 4.09m/s[tex]_{2}[/tex]. Determine the kinetic energy of the satellite , knowing that its orbitial speed is 22.9 x10[tex]_{3}[/tex]km/h

The answer:30.3 GJ

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I have drawn the free- body diagram, but I still don't know how to approach this problem.

I have considerd that :

1) THere is no work done on satellite by the earth. since the satellite is in cicular motion

so, I cannot use W=Fs to consider ??

2) No PE change, No KE change

so, I cannot use TE=KE+PE to consider??

3) Finally, this is a gravitation problem??

I try my best to recall what I have learned in secondary school, however, I sill haven't any idea on this..

Please help

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# Homework Help: Kinetics of particles (Energy)

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