Action and Reaction Pairs: Newton's Third Law

When two objects interact, they apply forces to each other of equal magnitude and opposite direction. In other words, every action has an equal and opposite reaction.

• I don't get it.

• I GOT IT!

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NGSS.MS-PS2-1

She throws the ball FORWARD against the wall and the wall pushes the ball _______________ toward her face with equal force! Ouch!

• UPWARD

• DOWNWARD

• FORWARD

• BACKWARD

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NGSS.MS-PS2-1

When a bird is flying, their wings are pushing DOWN against the air. In turn, the air pushes __________ against their wings allowing them to fly.

• DOWN

• UP

• FORWARD

• BACKWARD

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NGSS.MS-PS2-1

When a person is skateboarding, their leg is pushing BACKWARD against the ground. In turn, the ground pushes __________ against their foot allowing them to skateboard.

• DOWN

• UP

• FORWARD

• BACKWARD

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

A rocket pushes burning gases DOWN which causes the rocket to launch UP. Which law is this?

• Newton's 1st Law - Law of Inertia

• Newton's 2nd Law - Law of Acceleration

• Newton's 3rd Law - Law of Force Pairs (Action, Reaction)

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NGSS.MS-PS2-1

Which of the following is an example of Newton's Third Law of Motion?

• A book resting on a table

• A rocket launching into space

• A car accelerating on a highway

• A ball rolling down a hill

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NGSS.MS-PS2-1

Which of the following best describes action-reaction pairs?

• They act on the same object

• They act on different objects

• They cancel each other out

• They are unequal in magnitude

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NGSS.MS-PS2-1

Which of the following is an example of Newton's Third Law?

• A book resting on a table

• A rocket launching into space

• A car accelerating on a highway

• A ball rolling down a hill

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NGSS.MS-PS2-1

Which description best identifies the action-reaction pair between the bird and the fence post? (think Newton's Laws)

• Action: The force of the bird on the wires

  Reaction: The force of the wires on the fence post

• Action: The force of the wires on the fence post Reaction: The force of the fence post on the bird

• Action: The force of the fence post on the bird Reaction: The force of the bird on the wires

• Action: The force of the bird on the fence post Reaction: The force of the fence post on the bird

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NGSS.MS-PS2-1

When you push against a wall, what is the reaction force according to Newton's Third Law?

• The wall pushes back with an equal and opposite force

• The wall does not exert any force

• The wall exerts a greater force

• The wall exerts a lesser force