Question 9 (28 points)
The earth's gravity keeps the moon in orbit by pulling on it. The moon's gravity
A. can only pull on smaller objects such as asteroids but has no effect on the earth
B. pulls back on the earth
C. pushes the moon away from the earth
D. doesn't affect anything
Gravity always produces a pair (2) of equal forces in opposite directions. For example, your weight on the Earth is equal to the Earth's weight on you !
