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Q.

Escape velocity on a planet is  ve. If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes

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a

ve

b

4 ve

c

12ve

d

2 ve

answer is B.

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Detailed Solution

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ve=2GMR⇒ve∝M if R= constant 

If the mass of the planet becomes four times then escape velocity will become 2 times.

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Escape velocity on a planet is  ve. If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes