InterviewSolution
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InterviewSolution
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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 weighA. `W`B. `2W`C. `W//2`D. `2^(1//3) W` at the planet |
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Answer» Correct Answer - D `M_(p)=rho.4/3piR_(p)^(3), M_(e)=rho.4/3piR_(e)^(3)` `(g_(p))/(g_(e))=(GM_(p)//R_(p)^(2))/(GM_(e).R_(e)^(2))=(M_(p))/(M_(e)).(R_(e)^(2))/(R_(p)^(2))=((M_(p))/(M_(e)))((M_(e))/(M_(p)))^(2//3)` `=((M_(p))/(M_(e)))^(1//3)=(2)^(1//3)` `(W_(p))/(W_(e))=(mg_(p))/(mg_(e))=(2)^(1//3)` `W_(p)=(2)^(1//3)W_(e)=(2)^(1//3) W` |
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