A moving object is in equilibrium. Which best describes the motion of the object if no forces change?

It will change directions.

It will slow down and stop.

It will maintain its state of motion.

It will speed up and then slow down.

According to the Newtons first law, the object stays at rest and an object remains in motion with constant velocity unless acted upon with an unbalanced force. This is also sometimes referred as the law of inertia.

So if no forces that act on that object change, it will maintain its state of motion.

So the correct answer is the third option: It will maintain its state of motion.