Newton's Third Law

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.

• Always true

• Sometimes true

• Never true

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NGSS.MS-PS2-1

Forces always occur

• as single quantities

• in pairs

• by themselves

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NGSS.MS-PS2-1

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A person is attracted towards the center of Earth by a 440N gravitational force. The force with which Earth is attracted toward the person is

• More than 440N

• Less than 440N.

• The same, 440N.

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NGSS.MS-PS2-1

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An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

• larger.

• the same.

• smaller

• need more information to say.

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NGSS.MS-PS2-1

If a horse pulls on a wagon at rest, the wagon pulls back equally on the horse. Can the wagon be set into motion?

• Yes, because there is a net force acting on the wagon.

• Yes, because there is a time delay between action and reaction.

• No, because the forces cancel each other.

• Yes, because the horse's pull on the wagon is larger than the wagon's pull on the horse.

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NGSS.MS-PS2-1

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According to Newton's third law, if you push gently on something, it will push

• gently on something else.

• on you only if you aren't moving.

• gently on you

• on something only under the right conditions.

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NGSS.MS-PS2-1

Consider the picture shown above. Which is an action-reaction pair?

• A and C upon B, and B upon A and C

• A upon B and B upon A

• B upon C and A upon C

• A, B, and C are action-reaction forces

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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

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction force is...

• The grip of the player's hands on the ball
• the air resistance of the ball
• the force of the ball against the bat

Tags

NGSS.MS-PS2-1

You kick a soccer ball. What is true about the force on you and the ball?

• The force on the ball is bigger.

• The force on you is bigger.

• Both forces are the same.

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NGSS.MS-PS2-1