Question

acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth .If the rotio of densities of earth and moon is 5/3 then radius of moon Rm in terms of Re will be



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Answer 1

acceleration due to gravity g=4/3 pi rho GR

            ∴  g is directly proportional to rho R

or Gm/Ge=RHOm/RHOe]

∴ Rm/Re=[Gm/Ge][RHOe/RHOm] =1/6*1/5

∴ Rm=5/18Re

---------------th-----