Action and Reaction Forces

What is Newton's third law of motion?

• Every action has an equal and opposite reaction.

• Newton's third law of motion states that objects at rest tend to stay at rest.

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

• For every action, there is no reaction.

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Give an example of action-reaction force pairs.

• Kicking a ball and the ball kicking back

• Pulling a rope and the rope pulling back

• Lifting a weight and the weight lifting back

• Pushing against a wall and the wall pushing back

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When a person jumps off a boat onto the dock, what are the action and reaction forces involved?

• The action force is the person pulling the dock towards them, and the reaction force is the dock pulling back on the person.

• The action force is the person pushing off the boat, and the reaction force is the boat pushing back on the person.

• The action force is the person pushing off the dock, and the reaction force is the dock pushing back on the person.

• The action force is the person pulling the boat towards them, and the reaction force is the boat pulling back on the person.

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True or False: Action and reaction forces always cancel each other out.

• True

• Sometimes

• False

• Only in certain situations

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Explain how a rocket works based on Newton's third law.

• A rocket works by using magnets to propel itself forward.

• A rocket works by expelling high-speed exhaust gases in one direction, creating a reaction force in the opposite direction.

• A rocket works by burning fuel to create a vacuum that propels it forward.

• A rocket works by harnessing the power of gravity to propel it forward.

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When a car accelerates forward, what is the equal and opposite reaction?

• The car pushes backward on the ground.

• The car pushes forward on the ground.

• The car pushes downward on the ground.

• The car pulls forward on the ground.

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What happens to the force exerted by a person on the ground when they jump?

• The force exerted by a person on the ground increases momentarily when they jump.

• The force exerted by a person on the ground is negligible when they jump.

• The force exerted by a person on the ground remains constant when they jump.

• The force exerted by a person on the ground decreases when they jump.

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Give an example of a real-life application of action-reaction forces.

• Kicking a soccer ball

• Swinging on a swing

• Jumping off a diving board

• Throwing a frisbee

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True or False: Action and reaction forces always have the same magnitude.

• False

• Sometimes

• Depends on the situation

• True

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What is the relationship between the action and reaction forces?

• Different and opposite

• Equal and same

• Equal and opposite

• Equal and different

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