Imagine that you could magically move the moon closer to Earth, so that the distance from Earth to moon is cut in half. This would cause the force that Earth exerts on the moon to be
A) increased to four times its original value.
B) doubled.
C) reduced to 1/4 of its original value.
D) halved.
E) Nonsense-- Earth exerts no force on the moon.

Question

Quizplus · Accepted Answer

According to Newton's law of universal gravitation, the gravitational force is inversely proportional to the square of the distance between two objects. If the distance is halved, the force increases by a factor of four.

Imagine That You Could Magically Move the Moon Closer to Earth