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Q.

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

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a

29m

b

6m

c

18 m

d

23m

answer is A.

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Detailed Solution

Planet A ⇒gA=9g

Planet B ⇒gB=g

A man jumps to a height of 2m on surface of A is h = 2m

hA=u22(gA)=u22(9g)=u218g=2

hB=u22(gB)

hAhB=19⇒hB=9×hA=9×2=18m

The man jumps to a height of 18m on the surface of B

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