Question

51. A body of weight 72 N moves from the surface of
earth at a height half of the radius of earth, then
gravitational force exerted on it will be
(1) 36 N
(2) 32 N
(3) 144 N
(4) 50 N
be mace equal to mass of the earth but​

Answer 1

Answer:

32

Explanation:

mg=G M m/r^2.=72.

at height R/2,

weight=GMm/(3R/2)^2

=4×72/9=32.