Newton's 3rd Law

What does Newton's 3rd Law of Motion state?

• An object at rest stays at rest unless acted upon by an external force.

• For every action, there is an equal and opposite reaction.

• The acceleration of an object is directly proportional to the net force acting on it.

• The force of gravity acts between all objects in the universe.

Which of the following is an example of action and reaction forces?

• A book resting on a table.

• A rocket launching into space.

• A car accelerating on a highway.

• A person pushing against a wall and the wall pushing back.

When you jump off a small boat into the water, the boat moves backward. Which law explains this?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Law of Universal Gravitation

In the context of Newton's 3rd Law, what are force pairs?

• Two forces acting in the same direction.

• Two forces acting on the same object.

• Two forces that are equal in magnitude and opposite in direction.

• Two forces that cancel each other out.

Which of the following is NOT an example of Newton's 3rd Law?

• A swimmer pushing water backward to move forward.

• A bird flapping its wings to fly.

• A car engine producing exhaust gases.

• A ball rolling down a hill due to gravity.

How does Newton's 3rd Law apply to a basketball player jumping off the ground?

• The player exerts a force on the ground, and the ground exerts an equal force upward.

• The player exerts a force on the ball, and the ball exerts an equal force downward.

• The player exerts a force on the air, and the air exerts an equal force backward.

• The player exerts a force on the hoop, and the hoop exerts an equal force forward.

If a horse pulls on a cart with a force of 500 N, what is the force exerted by the cart on the horse?

• 250 N

• 500 N

• 750 N

• 1000 N

Which of the following sports activities is a clear demonstration of Newton's 3rd Law?

• A soccer ball being kicked.

• A tennis ball being served.

• A swimmer pushing off the wall of a pool.

• A cyclist pedaling uphill.

In a game of tug-of-war, if Team A pulls with a force of 800 N, what is the force exerted by Team B if the rope does not move?

• 400 N

• 600 N

• 800 N

• 1000 N

When a bird flies, it pushes air down with its wings. What is the reaction force?

• The air pushing the bird forward.

• The air pushing the bird upward.

• The air pushing the bird backward.

• The air pushing the bird downward.