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Q.

A planet has mass 1/10 of that of earth, while radius is 1/3 that of earth. If a person can throw a stone on earth surface to a height of 90m, then he will be able to throw the stone on that planet to a height-

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An Intiative by Sri Chaitanya

a

40m

b

100m

c

45m

d

90m

answer is C.

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Detailed Solution

$g = \frac{Gm}{R^{2}}; g^{'} / g = (\frac{1}{10}) {(\frac{3}{1})}^{2} = \frac{9}{10} : \frac{g^{'}}{g} = \frac{9}{10}$

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