1.

Mass of mars is (1)/(9)and radius (1)/(2) that of earth. A body weighs54 kg on surface of the earth. Its wt. on the surface of mars will be:

Answer»

50 kg
24 kg
30 kg
0 kg.

SOLUTION :`(W_(2))/(W_(1))=(mg_(1))/(mg_(1))=(g_(2))/(g_(1))=(M_(2))/(M_(1)) xx (R_(1)^(2))/(R_(2)^(2))=(1)/(9)*((2)/(1))^(2)=(4)/(9)`
`W_(2)=(4)/(3)W_(1)=(4)/(9)xx54=24 kg`.
Thus correct choice is (b).


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