If two unbalanced forces are exerted in opposite directions, their combined force is equal to ___________.

We know that unbalanced forces are not equal, and they always cause an object's motion to change speed and/or direction.

When two unbalanced forces are applied in opposite directions, the combined force equals the difference between the two forces.

The size and direction of the net force influence the motion.

This combined force acts in the direction of the greater force.

For example, if two students push on different sides of a box while seated on the floor, the student on the left uses less force than the student on the right.

Hence, if two unbalanced forces are exerted in opposite directions, their combined force is equal to the difference between the two forces.