Final answer:
For an object to maintain a constant non-zero velocity, it must have a net force of zero acting on it as per Newton's First Law of Motion. This implies that there is no acceleration and the object is in equilibrium. Therefore, the answer is A. The net force on the object is zero.
Step-by-step explanation:
If an object is moving with a constant non-zero velocity, one key truth must be that the net force acting on it is zero. This is a direct consequence of Newton's First Law, which often is restated as an object in motion will continue in motion with a constant velocity (and thus zero acceleration) unless acted upon by a net external force. A constant non-zero velocity implies that there is no acceleration; hence no net force is applied to the object in the direction of motion or opposite to it.
In scenarios like a car moving at constant velocity, the forces involved, such as friction between the road and tires and air drag, balance each other out, leading to a net force of zero. Newton's Second Law (F = ma) further informs us that when acceleration is zero, as in the case of objects at rest or in constant motion, the net force must also be zero. An object under equilibrium does not change its state of motion.
Therefore, the correct statement related to the object with constant non-zero velocity must be A. The net force on the object is zero.