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Imagine a new planet having the same density as that of earth but it is 3 times bigger

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g’, then

Options

(a) g’=g/9
(b) g’=27g
(c) g’= 9g
(d) g’= 3g

Correct Answer:

g’= 3g

Explanation:

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