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Q.

While revolving around the earth, a satellite has kinetic energy K, potential energy U and total energy E. If the value of EK is x and EU. is y, then ratio xy is

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a

3 : 1

b

2 : 1

c

3 : 2

d

2 : 3

answer is B.

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Detailed Solution

detailed_solution_thumbnail

As we know that for the earth and satellite system,

 Kinetic energy, K=GMm2a

 Potential energy, U=−GMma

And totalenergy, E=−Gmm2a

Therefore x = -1 and y = -1/2

xy=2

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