A body weighs 700 gm wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is 17 and radius is half that of the earth
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a
200 gm wt
b
400 gm wt
c
50 gm wt
d
300 gm wt
answer is B.
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Detailed Solution
We know that g=GMR2On the planet gp=GM/7R2/4=4g7=47gHence weight on the planet =700×47=400 gm wt