When an electric current flows through a long conductor, each free electron moves
a. back and forth between the ends of the conductor.
b. from one end of the conductor to the other end.
c. with a speed of 300,000,000 m/s.
d. through a relatively short distance.

D) through a relatively short distance.

The acceleration due to gravity is always 9.8 m/s/s, regardless of the ball's velocity. If a person drops a ball from resting point, and the ball accelerates downward at a rate of 9.8 m/s2 it would still be the same. I hope this helps.. Sorry if it didn't.