8. The acceleration of an object is zero. Which best describes the possible motion of the object?

The object is traveling at constant velocity or is slowing down.

The object is traveling at constant speed but may be changing direction.

The object is at rest or is traveling at constant velocity.

The object is at rest.

Answer

C

The object is at rest or is traveling at constant velocity.

Explanation

Acceleration is rate of change of velocity and velocity is a vector quantity which means that it is speed with direction.

If acceleration is zero it means that velocity is constant.

Constant velocity may include zero velocity or "at rest"

and

Speed is zero or speed is constant and no change in direction