Newton's 3rd Law: Action/Reaction

The picture is an example of Newton's...

• Apple Tree Hypothesis

• inability to swim, which later in life became his downfall

• 3rd Law of Motion

• 3rd Law of Buoyancy

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An archer pulls the bowstring back, then releases the string and the arrow flies forward. Pulling the string back is the...

• action force

• reaction force

• net force

• inertia

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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 masses.

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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 standing still.

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If you push against a wall with a force of 10 N, what is the force exerted by the wall on you?

• 0 N

• 5 N

• 10 N

• 20 N

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

• A swimmer pushing water backwards to move forward.

• A bird flapping its wings to fly.

• A car parked on a hill.

• A person walking by pushing the ground backwards.

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

• 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.

• Two forces that act in the same direction.

Which of the following scenarios best illustrates Newton's 3rd Law?

• A ball rolling down a hill.

• A person sitting on a chair.

• A fish swimming by pushing water backwards.

• A leaf falling from a tree.

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

• The air pushing the bird upwards.

• The bird moving forward.

• The bird's wings flapping.

• The bird's weight.

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NGSS.MS-PS2-1

Newton's 3rd Law states that for every action there is an equal and opposite ________.

• reaction

• satisfaction

• fraction

• transaction

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