Newton's Third Law

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

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

How many Laws of Motion are there?

• 1
• 2
• 3
• 4

Which best explains why we are able to accelerate forward when starting to run?

• As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
• No acceleration takes place. Runners are always at a fixed velocity.
• The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
• The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward

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NGSS.MS-PS2-1

What happens when two objects, such as a baseball and a bat, collide?

• They hit each other with the same force in the same direction.

• They hit each other with the same force in opposite directions.

• One remains still while the other one moves in the same direction.

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NGSS.MS-PS2-1

According to Newton's _____ Law of Motion, when a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer.

• First
• Second
• Third
• Fourth

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NGSS.MS-PS2-1

Forces do not occur in pairs.

• True
• False

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NGSS.MS-PS2-1

The ____ of an object is the force of gravity on the object.

• mass
• weight
• volume
• density

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NGSS.MS-PS2-4

The ____ of an object is a fundamental measure of the amount of matter in the object.

• mass
• weight
• volume
• dimension

If the mass of an object is 1000 kg on Earth, what is it's mass on the moon?

• 10kg
• 100kg
• 1000kg
• 10,000kg