Science Chapter 2 Forces Section 4 Action and Reaction

Describe and explain a situation that shows action-reaction forces in action.

A squid applies to Newton's third law of motion to move itself through the water. The squid exerts a force on the waterwater (action force) that it expels from its body cavity. At the same time, the water exerts an equal and opposite force on the squid (reaction force), causing it to move.water (action force) that it expels from its body cavity.

Compare and contrast balanced forces and action-reaction forces.

Balanced forces are equal and opposite and ass up to a net force of zero. They cancel out and produce no change in motion. Action and reaction forces are equal and opposite as well but the forces are acting on different objects. The action and reaction forces acting on an object cannot be added together because they are acting on different objects

Why are forces not one-sided?

Forces are not one-sided because whenever one object exerts a force on a second object, the second object exerts a force back on the first object.

How can two forces be equal but opposite?

If someone pushes someone else, both the person who was pushing and the person who was pushed move. The person who was pushed moves backward and the person who pushed is pushed in the opposite direction with an equal force.

What is Newton's third law of motion?

Newton's third law of motion states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

How is the force exerted by the first object related to the force exerted by the second object?

The force exerted by the second object is equal in strength and opposite in direction to the first force.