If a moon feels an attractive force 80,000N from a planet, what kind of force will the planet feel from the moon if the distance between them is doubled?

N

Based on the equation F = G (m_{1} m_{2}) /r^{2}
, we see that the force will decrease by a factor of 4 if the radius is
doubled. The planet will feel a force of 20,000N from the moon (the planet and
the moon will feel equal forces because of Newton’s third law)