Forces acting in opposite directions are called opposing forces. They are forces that act on the same object but in the opposite directions.

Here are some examples of opposing forces:

* Friction and applied force: When you push a box across the floor, you apply a force to the box. The friction between the box and the floor acts in the opposite direction, resisting the movement.

* Gravity and lift: An airplane in flight experiences the force of gravity pulling it down. To stay airborne, the wings generate lift, which acts upwards in the opposite direction of gravity.

* Tension and gravity: When a weight hangs from a rope, the tension in the rope acts upwards, opposing the force of gravity pulling the weight downwards.

* Thrust and drag: A rocket experiences thrust from its engines, pushing it forward. Drag, caused by air resistance, acts in the opposite direction, slowing the rocket down.

Important points to remember:

* Opposing forces can be equal in magnitude, resulting in a balanced force, where the object remains at rest or in constant motion.

* Opposing forces can be unequal in magnitude, resulting in an unbalanced force, where the object accelerates in the direction of the stronger force.

Let me know if you would like more examples or explanations on any of these forces!