How much gravitational force are you exerting on your friend?

Question

If you and a friend 13 m away each have masses of 69 kg, how much gravitational force are you exerting on your friend?

Answer should be in Newtons.

Answer 1

zero,because the human body is not a solid object that you calculate gravitational force.

Answer 2

Force of g between to bodies - Fg = G (M1* M2) / r^2

Answer 3

F = Gm1m2/r^2

G = 6.67 * 10^-11 m^3/kg/s^2

m1 = 69 kg

m2 = 69 kg

r = 13 m

F = 6.67 * 10^-11 * 69 * 69/13^2 N

= 1.88 * 10^-9 N

Answer 4

Fg = G (M1* M2) / r^2

           = G (69 * 69) / 169

use 6.67300 × 10-11 m^3 kg^-1 s^-2

Fg will be 1.88 x 10 ^-9 N