When multiple forces acting on an object at rest are opposed but unbalanced, the object will not remain at rest. According to Newton's second law of motion, an unbalanced force will cause an object to accelerate in the direction of the net force. Since the forces are opposed but unbalanced, there will be a net force acting on the object, which will result in motion.
Therefore, the most accurate effect of the unbalanced forces on the object at rest would be summarized as:
- Motion will be either created, stopped, or changed.
This means that the object may start moving in the direction of the net force or change its current state of motion. The other options provided are not correct in this context:
- The mass of the object does not change due to the forces.
- The acceleration of the object will not necessarily increase; it will depend on the net force and mass.
- The unbalanced forces will not cause the object to produce a humming sound inherently; sound production would depend on other factors, such as vibration or rapid movement through a medium.