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In a car accident your body has a certain amount of momentum and it wants to keep moving forward.

The seat-belts slow the body down enough so they don't hit the wind-shield or dashboard etc.

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Q: How does inertia explain why seatbelts are important in a car crash?
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Why must seatbelts be replaced after a crash?

A seat belt has to be replaced after a crash because large forces may have damaged it.


Properly worn seatbelts should increase the chance of survival when involved in a traffic crash by?

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