Opposing forces

The video explains the concept of opposing forces, using examples like a swimmer pushing against a wall and a person sitting on a chair. It highlights how these forces work in both stationary and moving objects, such as trains, and how balance or imbalance of these forces affects motion and stability.

What happens when a swimmer kicks against a wall?

• The swimmer moves backward.

• The swimmer remains stationary.

• The swimmer moves forward.

• The swimmer sinks.

What keeps a person stationary when sitting on a chair?

• The chair's weight.

• Balanced opposing forces.

• The person's weight.

• Unbalanced forces.

What occurs if the chair's force is weaker than the force of gravity?

• The person will float.

• The chair will become stronger.

• The chair will collapse.

• The person will remain stationary.

What is the opposing force to a train's engine force?

• Friction.

• Wind resistance.

• Gravity.

• Magnetism.

What happens when the engine's force is less than the friction force?

• The train speeds up.

• The train slows down and eventually stops.

• The train moves backward.

• The train moves at a constant speed.