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Q.

The escape velocity from the surface of earth is Ve. The escape velocity from the surface of a planet whose mass and radius are 3 times those of the earth will be

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a

Ve

b

3Ve

c

9Ve

d

27Ve

answer is A.

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Detailed Solution

ve=2GMR  ∴ve∝MR ⇒∴v2v1=M2R1M1R2=4M1R1M14R1=1 v1=v2=ve

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