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File:R = geo Re 2012-10-08 1809.png

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R_=_geo_Re_2012-10-08_1809.png (747 × 521 pixels, file size: 47 KB, MIME type: image/png)

Summary

Description
English: plot of kinetic energy EK, gravitational potential energy, EP and total Energy versus distance away from centre fo earth, r at R = geostationary radius

Question: An earth satellite of mass 200 kg lost energy slowly through atmospheric resistance and fell from an orbit of radius m to m. Calculate the changes in the potential, kinetic and total energies of the satellite during this transition period.

Solution:

Assuming the orbits are in circular motion as it decays from to

equation can be assumed to be valid to approximate this motion

Thus,


since

imply

This answer can also be verified from the formula relationship not intended to be memorized.
Date
Source Own work
Author Lookang many thanks to author of original simulation = Todd Timberlake author of Easy Java Simulation = Francisco Esquembre

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Date/TimeThumbnailDimensionsUserComment
current10:15, 8 October 2012Thumbnail for version as of 10:15, 8 October 2012747 × 521 (47 KB)LookangUser created page with UploadWizard

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