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Seatbelt Safety Study: Impact of Speed on Chest Forces

Learn the effects of seatbelt use on chest forces at various speeds from 25 to 55 MPH. Discover injury risks and impact of not using seatbelts up to 55 MPH.

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Seatbelt Safety Study: Impact of Speed on Chest Forces

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  1. 25 and 55 MPH

  2. 25 and 55 MPH

  3. Two Belts The force acting on the chest at 25 mph is 1021.367 lbs and the force acting on the chest at 55 mph is 1371. 472 lbs. Both are within the specified tolerances.

  4. One Belt With one belt the displacement is too much at both 25 and 55 mph and the person would hit the windshield.

  5. Injury At 63 mph internal chest injury occurs.

  6. No Belt The length of time it takes for the person to hit the windshield with no seatbelt at 25, 40, and 55 mph are respectively 0.156, 0.116, and 0.888 seconds.

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