An elevator is supported by a cable and is moving downward through the elevator shaft at constant speed. How does the upward tension force in the cable compare to the downward force of gravity?
A
The only force acting on the elevator is the force of gravity because it is moving downward.

B
The upward tension force in the cable is greater than the downward force of gravity.

C
There are no forces acting on the elevator because it is moving at constant velocity.

D
The upward tension force in the cable is equal to the downward force of gravity.