Question

Question #22749

Answer 1

F = `-(G. m_1xxm_2)/(r^2)` where G is just a very small constant `(6.67 xx 10^-11`) and r is the distance between them.

Explanation:

Be careful with (a) formatting in your calculation (use of brackets recommended) and (b) the negative sign at the start - that just shows that though we measure r increasing away from the first mass, the force is directed towards the mass. Clearly, because of equal and opposite forces (Newton's third law) they both feel the same force.

I get 1.334 x `10^-12` N