Question

28. What do you mean by gravitational constant ? state it's SI units.
Calculate the force of attraction between two metal spheres each of mass 90 kg. If the distace between
their centres is 40 em. (G-6.67 10 Nm /kg)​

Answer 1

Explanation:

F=GMm/R^2

Here G is gravitational constant.

G=FR^2/Mm

Therefore SI unit, Nm^2/kg^2

Now your question, as per your given

Force of attraction =6.67 * 10 * 90*90/40*40

=337.66 N

Sorry for my mistake