Q. If both the mass and radius of Earth decrease by $1 \%$, the escape velocity will :

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A

Be doubled

9%

B

Be halved

12%

C

Be tripled

6%

D

Not change

73%

Solution:

Escape velocity is given as $(2 g R)^{1 / 2}$ here $g$ is increasing by $1 \%$ and $R$ is decreasing by $1 \%$ so no change in escape velocity.

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