Acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth. If the ratio of densities of earth ( pe ) and moon ( pm ) is ( pe/pm ) = 5/3 then radius of moon Rm in terms of Re will be
(a) 5/18 Re (b) 1/6 Re
(c) 3/18 Re (d) 1/2√3 Re
Answer: a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a