Newton's Laws of Motion: Vehicle Restraints QUIZ

When a car suddenly stops, the passengers keep moving forward until stopped by a seat belt. Which law of motion explains this?

• First Law (Inertia)

• Second Law (Force and Acceleration)

• Third Law (Action–Reaction)

• Law of Gravity

A seat belt keeps a person from flying forward during a crash because it applies an unbalanced force. Which law is being applied?

• First Law

• Second Law

• Third Law

• Law of Friction

The harder a car crashes, the more force the seat belt must apply to stop the passenger. Which law explains this relationship?

• First Law

• Second Law

• Third Law

• Law of Pressure

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The seat belt pulls back on a passenger with equal force as the passenger pushes forward. Which law is being demonstrated?

• First Law

• Second Law

• Third Law

• None of the above

An airbag inflates to increase the time it takes for a passenger to stop moving. Why does this reduce injuries?

• It decreases acceleration, reducing the force on the passenger.

• It stops inertia from occurring.

• It increases the passenger’s mass.

• It eliminates all motion.

In a crash, a larger passenger experiences more force than a smaller passenger when the same acceleration occurs. Which law explains this?

• First Law

• Second Law

• Third Law

• Law of Conservation of Energy

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The passenger pushes forward on the seat belt, and the seat belt pushes backward with the same force. This is an example of which law?

• Newton’s First Law

• Newton’s Second Law

• Newton’s Third Law

• All of the above

Why do cars need both seat belts and airbags to keep passengers safe?

• Because both together show all three of Newton’s Laws at once

• Because seat belts cause more acceleration

• Because airbags replace the need for inertia

• Because seat belts increase the car’s speed

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When the car moves forward and suddenly stops, which of the following best shows the three laws acting together?

• The car, seat belt, and passenger each act independently.

• The passenger’s inertia keeps them moving, the seat belt applies a stopping force, and equal forces push in opposite directions.

• Only inertia is shown.

• The seat belt removes all motion and reaction forces.

Short Answer: In your own words, explain how seat belts and airbags show all three of Newton’s Laws of Motion.

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