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Q.

Find the ratio of escape speed of two planets if the ratio of the radii of the planets P1 and P2 is k1 and the corresponding ratio of the acceleration due to the gravity on them is k2.

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a

k1k2

b

k1k2

c

k1k2

d

k2k1

answer is B.

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Detailed Solution

ve=2gR∴vep1vep2=g1R1g2R2=g1g2×R1R2=k1k2
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