Questions
A satellite is moving in a circular orbit of radius around earth with kinetic energy K. What work is to be done on the satellite to stop the satellite at any position in its orbit
detailed solution
Correct option is D
Total energy of the satellite=−K=−GMm2rAfter the satellite is stopped, its total energy will be equal to its potential energy U=−GMmr=−2K∴ Work done = Final total energy - Initial total energy =−2K−(−K)=−KTalk to our academic expert!
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The masses, each of mass m are kept on the vertices of an equilateral triangle of side a. Find the work needed to be done to change the length of the triangle twice of its original value.
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