When the net force on an object is zero, the object will either remain at rest or continue to move at a constant velocity. Therefore, the correct responses would be:
- The object is at rest.
However, it's also possible that the object is moving at a constant speed in a straight line. So, if the question implies the object could also be in motion, then the best answer generally to describe the scenario where net force is zero is that the object remains in its state of motion (either at rest or moving with constant velocity).
Since the options provided do not explicitly account for constant motion, the closest correct answer would be:
The object is at rest.