Question

Q. If a planet existed whose mass is
twice that of earth and whose radius
was 3 times than that of earth. Find

acceleration due to gravity of that
planet ?​

Answer 1

Explanation:

Here,MP=2MeandRp=3Re

m=1kg,Wp=?

Asge=GMeR2e and gp=GMPR2p

gpge=MpR2p×R2eMe=MpMe×(ReRp)2

gp=ge×M⋅pMe×(ReRp)2

or gp=9.8×2×(13)2=2.17m/s2

Wp=mgp=1×2.17=2.17N

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