Question

if the net force is 0 the object is ___________
motionless
accelerating
decelerating
in motion

Explanation:

According to Newton's first law of motion, an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. When the net force is 0, there is no unbalanced force to change the object's state of motion. So the object can be either motionless (if it was initially at rest) or in motion (moving with a constant velocity, which means no acceleration or deceleration).

Answer:

in motion