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Question

A planet has mass 110th of that of earth, while radius is 13rd that of earth. If a person can throw a stone on earth surface to a height of 90 m, then he will be able to throw the stone on that planet to a height (in meter)-

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Solution

g=GMR2
gpge=MPMe(ReRp)2
=110×(31)2=910
H=u22g
HpHe=gegp
Hp=109×90=100 m

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