Question

When a stone of mass m is falling on the earth of mass M, the acceleration of the earth will be....?
Ans => mg/M

Answer 1

imagine a ball dropped down at some point of height from the ground of mass m. the force is attractive and it is mg .. dividing by the mass of the earth will give you the acceleration also the net would be mg/m+M

Answer 2

Answer:

Explanation: force exerted by falling stone on earth, F = mg .....(1)

Acceleration of the earth = F/M = mg/M

.......[F=mg from (1)]