Understanding Car Crashes Video & Questions

What does a vehicle's 'crumple zone' do?

• Increases the vehicle's speed

• Increases the impact force

• Absorbs and dissipates crash forces

• Prevents the vehicle from stopping

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What property of matter causes it to resist any change in its state of motion?

• Inertia

• Friction

• Momentum

• Gravity

According to Newton's first law of motion, what will a body in motion do unless acted upon by an external force?

• Change direction

• Stop immediately

• Continue moving at the same speed

• Accelerate

Why are seat belts important during a crash?

• They increase the body's momentum

• They tie the body to the vehicle, slowing it down with the vehicle

• They help the body accelerate

• They increase the force on the body

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What does the formula F=ma represent?

• Impulse

• Momentum

• Newton's second law of motion

• Inertia

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Which has the same momentum: an 80,000 pound big rig traveling 2 mph or a 4,000 pound SUV traveling 40 mph?

• Both have the same momentum

• The SUV

• The big rig

• Neither, as they cannot be compared

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What is the product of force and the time during which the force acts called?

• Velocity

• Momentum

• Acceleration

• Impulse

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What does the conservation of momentum principle state about the total momentum before and after a collision?

• It decreases after a collision

• It increases after a collision

• It remains unchanged

• It is not conserved in any collision

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What is the primary advantage of a heavier vehicle in a crash?

• Better fuel efficiency

• Higher momentum

• Advantage in a crash with another vehicle

• Faster acceleration

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What does kinetic energy depend on?

• Mass and velocity

• Mass and color

• Weight and height

• Volume and speed

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