Earth exerts a gravitational force on the Moon, keeping it in its orbit.The reaction to this force, in the sense of Newton's third law, is:
A)the centripetal force on the Moon
B)the nearly circular orbit of the Moon
C)the gravitational force exerted on Earth by the Moon
D)the tides due to the Moon
E)the apple hitting Newton on the head

Question

Quizplus · Accepted Answer

According to Newton's third law, for every action, there is an equal and opposite reaction. Therefore, the gravitational force exerted by the Moon on the Earth is the reaction to the gravitational force exerted by the Earth on the Moon.

Earth Exerts a Gravitational Force on the Moon, Keeping It