Newton's Third Law of Motion

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 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

Tags

NGSS.MS-PS2-1

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.MS-PS2-1

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

• smaller
• equal
• larger

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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 swimmer pushes on the water and the water pushes on the hand and the swimmer moves forward. What is the REACTION 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

If the gymnast decreases the force they exerts on the trampoline, what will the reaction be?

• The gymnast will be pushed back by the trampoline with more force and go higher into the air

• The gymnast will be pushed back by the trampoline with less force and not go as high into the air

• No change will happen to the gymnast

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NGSS.MS-PS2-1

Katniss Everdeen applies 20 N of force back on her bow. What happens to the arrow when she lets go?

• The arrow goes backwards

• The arrow goes forwards with 20 N

• The arrow goes forwards with 30 N

• The arrow goes forwards with 0 N

Tags

NGSS.MS-PS2-1

Forces do not occur in pairs.

• True
• False

Tags

NGSS.MS-PS2-1

Action and reaction forces always cancel out.

• True

• False

Tags

NGSS.MS-PS2-1