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The question is somewhat ambiguous. It could be asking either one of two different questions.

Here are the answers to both:

1). The moon does not fall to earth because it has tangential velocity which, when combined with the force of gravity toward the center of the earth, results in a stable Keplerian elliptical orbit.

2). Apples do not fall to the moon because of the following facts:

a). The apple's distance from the moon's center is roughly 60 times the apple's distance from the earth's center.

b). The earth's mass is roughly 82 times the moon's mass.

c). The result is that the gravitational force attracting the apple to the earth is roughly 295,000 times the force attracting it toward the moon.

The same situation holds true for all objects on the earth. A car, attracted to the earth
with a force (weight) of 2000 pounds (1 ton), is also attracted to the moon by a force
of about 1/10th of an ounce. When it falls, it falls in the direction of the greater force.

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