An object is moving across a surface, but it does not gain or lose speed. which best describes the object’s force? the net force is positive. the net force is zero. the positive force is greater than the negative force. the negative force is greater than the positive force.

Option B , The net force is zero.

Explanation:

When all the forces in any surface are such that the net force at a point comes to be zero then the object either do not move or in case if it moves it moves with a constant acceleration or velocity.

In this case the speed is neither gained nor lost, which means that there is no change it the motion of the object thus, the net force acting on this object is zero.

Therefore, option B is correct.