Certify Teacher Practice Test

When a net force of 15 N acts on a box to the right, the box experiences an unbalanced force, which means that the forces acting on the box are not in equilibrium. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This means that when a net force is applied, the object will accelerate in the direction of that force. Since the net force in this scenario is directed to the right, the box will also move to the right. The movement of the box to the right occurs regardless of its initial state—whether it was initially at rest or in motion—because the net force directly influences its acceleration. Thus, with a net force of 15 N pushing to the right, the box will not stay at rest, move to the left, or simply move at a constant speed; instead, it will begin to move to the right, gaining speed as long as the force continues to act on it.