Newton's Third Law

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

• Newton's
  1st
  Law of Motion

• Newton's
  2nd
  Law of Motion

• Newton's
  3rd
  Law of Motion

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NGSS.MS-PS2-1

Newton's Third Law States...

• Objects in motion stay in motion and objects at rest stay at rest

• Force is equal to mass times acceleration

• For each action there is an equal and opposite reaction

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NGSS.MS-PS2-1

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

An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...

• Air resistance against the bow

• the arrow's push against the bowstring

• the grip of the archer's hand on the bow

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NGSS.MS-PS2-1

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

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

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NGSS.MS-PS2-1

Lauren and Riley are discussing Newton's Third Law. Can you help them by choosing the correct statement?

• An object in motion stays in motion.

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

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

• The force of gravity is inversely proportional to the square of the distance.

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NGSS.MS-PS2-1

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

• A ball rolling down a hill speeds up.

• A book resting on a table.

• A rocket launching into space.

• An apple falling from a tree.

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NGSS.MS-PS2-1

When you jump off a small boat into the water, why does the boat move backwards?

• Because of the water's resistance.

• Because of your weight.

• Because of the reaction force from your jump.

• Because of the gravitational pull of the Earth.

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DOK Level 2: Skill/Concept

A student throws a ball against a wall.  Which statement best explains what is happening in the picture.

• The energy of the ball is destroyed as it strikes the wall.

• The energy of the ball becomes negative as it hits the wall.

• The force from the wall on the ball is equal and opposite to the force from the ball on the wall.

• The force exerted by the ball on the wall is greater than the force exerted by the wall on the ball.

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NGSS.MS-PS2-1

NGSS.MS-PS3-5

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

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

• Every mass exerts a force on every other mass.

• An object at rest tends to stay at rest.

• Friction opposes the motion of an object.

Tags

NGSS.MS-PS2-1