Question

Two spherical balls each of mass 1 kg are placed 1 cm apart the gravitational force of attraction between them

Answer 1

GIVEN :-
M1=M2=1
r = 1 cm

Here Using Formula

F=GM/r^2

F= 6.67×10^-11 × 1 / 1

THEREFORE FORCE = 6.67×10^-11.

Answer 2

Answer:6.67 × 10^-9N

Explanation:

Given:- two balls of 1 kg each, 1cm apart.

Distance or r^2 must be in SI units, so r:- 1×10^-2

Now,

F=Gmm/r^2

F= 6.67×10^-11 × 1 × 1/1×10^-2

F= 6.67 × 10^-11+2

F= 6.67 × 10^-9

Ans. 6.67 × 10^-9N