Physics 3rd 6 Weeks Review 20-21

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

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.HS-PS2-1

A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...

• Less than 1, 000 N
• 1,000 N
• More than 1,000 N

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NGSS.MS-PS2-1

According to Newton's Third law the strength or magnitude of forces will be...

• smaller
• equal
• larger

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What is the reaction force to a foot pushing down on the floor?

• The foot going through the floor
• The floor pushing back against the foot
• The floor breaking to the foot

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NGSS.HS-PS2-1

A swimmer pushes on the water and the water pushes on the hand and the swimmer moves forward. What is the ACTION force?

• Swimmer pushes on the water

• the water pushes on the hand and the swimmer moves forward

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NGSS.MS-PS2-1

A bowling ball hits the pins and the pins fall over. What is the ACTION force?

• Bowling ball hitting pins

• Pins falling over

Forces do not occur in pairs.

• True
• False

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NGSS.MS-PS2-1

Which law explains how rockets are launched into space?

• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Third Law of Motion
• Newton's Fourth Law of Motion

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NGSS.MS-PS2-1

The amount of matter in an object

• mass
• weight
• inertia
• gravity

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