The ratio of the K.E. required to be given to the satellite to escape earth's gravitational field to the K.E. required to be given so that the satellite moves in a circular orbit just above earth atmosphere is
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a
One
b
Two
c
Half
d
Infinity
answer is B.
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Detailed Solution
K.E. required for satellite to escape from earth's gravitational field 12mve2=12m2GMR2=GMmRK.E. required for satellite to move in circular orbit 12mv02=12mGMR2=GMm2RThe ratio between these two energies = 2