Question

12. If a body's weight is 36 kg on the surface of the earth, how much would its
weight on the surface of a planet whose mass is 1/9 and radius 1/3 of the earth
(a) 32 kg
(b) 36 kg (c) 12 kg
(d) 10 kg
explain in detail​

Answer 1

Explanation:

Force is directly proportional to m/r²

so, W at earth is = m/r² = 36 kgwt..

and for other planet , it will be

W' = (1/9)/(1/2²) = 4/9m/r²

so W' = 4/9*(36) = 16kgwt.