Collisions & Momentum Test Review

What does Newton's 3rd Law state?

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

• An object at rest remains at rest until acted on by an unbalanced force.

• The tendency of an object to resist a change in motion.

Tags

NGSS.MS-PS2-1

Newton’s 3rd law states that for every action, there is an equal and _______ reaction.

• balanced

• opposite

• unbalanced

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NGSS.MS-PS2-1

Forces always occur _______.

• in the same direction

• alone

• in pairs

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Newton’s 3rd law is also known as the law of _______.

• inertia

• action & reaction

• momentum

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NGSS.MS-PS2-1

A rock on the ground weighs 40 N. How much force does the ground exert on the rock?

• 20 N

• 0 N

• 40 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Based on Newton’s 3rd law, the force pairs always act on _______.

• different objects

• the same object

• objects in motion

Tags

NGSS.MS-PS2-1

The bat hits a ball. What is the reaction force?

• gravity pulling

  the ball down

• the ball hits

  the bat

• air resistance slowing the

  ball down

Tags

NGSS.MS-PS2-1

You sit in a chair. You push the chair down. What is the reaction force?

• Gravity pushes

  the chair up.

• The chair pushes you down.

• The chair pushes you up.

Tags

NGSS.HS-PS2-1

Gravity pulls a skydiver down as air friction (drag) pushes the skydiver up. Is this an action-reaction pair?

• No, because both forces are acting on the skydiver.

• Yes, because there are two forces involved.

• Yes, because the forces are equal and opposite.

Tags

NGSS.MS-PS2-4

A bug hits a windshield. The force of the bug on the windshield is _______ the force of the windshield on the bug.

• greater than

• less than

• the same as

Tags

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