Q. 45.0( 1 Vote )

Consider a planet in some solar system which has a mass double the mass of the earth and density equal to the average density of the earth. An object weighing W on the earth will weigh
A. W

B. 2W

C. W/2

D. 21/3 W at the planet.

Answer :

Let the mass of earth be and that of planet be . let the radius of earth be and that of planet be . Let the density of earth be and that of other planet be .

Form the given information,


and




.


The weight on Earth would be



Therefore, gravitational force on the planet would be


(ANS)

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