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Questions  

Escape velocity of a body from earth is about 11 km/sec. Assuming the mass and radius of the earth to be about 81 and 4 times the mass and radius of the moon, the escape velocity in km/sec from the surface of the moon will be :

a
0.54
b
2.44
c
11
d
49.5

detailed solution

Correct option is B

ve=2GMR

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