Question

20.
The mass of a planet is twice and its radius is 3 times that of the earth. The weight of a body, which has
a mass of 5 kg on the surface of the earth, on that planet is :-(-9.8m/s)
(A) 11.95 N
(B) 20.9 N ( 10.85 N (D)9.9 N​

Answer 1

Answer:

10.85 N

Explanation:

Here,MP=2MeandRp=3Re

m=5kg,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=5×2.17= 10.85

Hope it helps!