What happens when a penny is dropped from a height of 20 meters?

a) the force of gravity causes it to accelerate.
b) its mass doubles for every second it falls.
c) it changes direction every 9.8 meters.
d) it falls at a constant velocity.

explain

A) The force of gravity causes it to accelerate.

Explanation:

Gravity is the force that pulls everything down to earth. The force is caused by attraction between objects. The bigger an object, the stronger its force it.

The formula for gravity is (m)(a), mass times acceleration. Acceleration means the object increases its speed over time.

B) The mass is the matter that makes up an object. It does not change as it is falling.

C) The direction does not change because it is being pulled straight down.

D) Gravity causes acceleration because as the object nears Earth, the force of attraction is stronger.