Two Truths and a Lie Newton's Third Law

Newton’s law states that for every action, there is an ________ reaction.

• unequal and opposite

• equal and similar

• stronger and opposite

• equal and opposite

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NGSS.MS-PS2-1

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

• False

• True

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NGSS.MS-PS2-1

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

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Action reaction forces never cancel each other out because

• They act on different objects.

• They act on the same objects

• They do not act on objects.

How is this an example of Newton’s Third law?

• Only the ball is using the head

• They are both exerting an equal force on each other

• Only the head is pushing the ball

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NGSS.MS-PS2-1

If two people with the same mass collide, they experience the same amount of force.

• True

• False

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Action-reaction pairs can cause a change in motion.

• True

• False

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NGSS.MS-PS2-1

When the person pushes the ground with their foot, the equal and opposite reaction force is

• the ground pushing back on their foot

• when they start to move forward

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NGSS.HS-PS2-1

Force always come in________

• waves

• triplets

• pairs

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NGSS.MS-PS2-1

When a heavy football player and a light one run into each other, who exerts more force

• The light one

• Their force are equal

• The heavy one

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