Which pulls harder gravitationally, the earth on the moon, or the moon on the earth? which accelerates more?

a. the moon on the earth; the moon.
b. the moon on the earth; the earth.
c. the earth on the moon; the earth.
d. both the same; the moon.
e. the earth on the moon; the moon.
f. both the same; the earth

d) Both the same; the Moon

Explanation:

The force that any body exerts on the other on account of his mass, is just one of the two forces that form an action-reaction pair, according to Newton's 3rd Law.

This law says that both forces are equal and opposite each other, being produced by one body, but acting on the other one, both at the same time.

The difference, regarding the net effect of these forces, rests on the acceleration of both masses, according Newton's 2nd Law.

As the forces are equal each other, the body with smaller mass (in this case the moon) will have a larger acceleration.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.