The acceleration due to gravity on the planet A is 9 times the acceleration due to the gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same person on the planet B

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18m

23m

29m

answer is A.

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Detailed Solution

We know that acceleration due to gravity decreases with height, i.e., g∝1/h∴ gAgB=hBhA or hB=gAgB×hAor hB=9gBgB×2=18m

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