Unbalanced forces are acting on an object when there is a net force that results from the forces being applied in different directions or with different magnitudes.
In the situations provided, the following scenario indicates unbalanced forces:
- Two people stand on the same side of a large tire. One person pushes the tire and the other pulls the tire with equal force.
In this case, although both individuals exert equal force, one is pushing while the other is pulling, resulting in a net force in the direction of the push or pull, thus creating unbalanced forces.
The other options involve forces that are either equal and opposite (which would lead to balanced forces) or are applied on the same side in such a way that they would not result in unbalanced forces.