How Airbags in Automobile works?
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In terms of impulse and momentum, why do airbags in car reduce the chances of injury in accidents?
Seat belts and airbags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in front of the car. In the event of an impact, the passenger compartment decelerates over a distance of about 1m as the front of the car crumples. An occupant restrained by seat belts and airbags decelerate with the car. By contrast, an unrestrained occupant keeps moving forward with no loss of speed (Newton's first law!) until hitting the dashboard or windshield. These are unyielding surfaces, and the unfortunate occupant then decelerates over a distance of only about 5 mm.Part A.A 60 kg person is in a head-on collision. The car's speed at impact is 15 m/s. Estimate the net force on the person if he or she is wearing a seat belt and if the airbag deploys.Part B.Estimate the net force that ultimately stops the person if he or she is not restrained by a seat belt or airbag.Part CWhat is the force in part A in terms of the person's weight?Part DWhat is the force in part B in terms of the person's weight?
An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck. The truck has a constant acceleration of 2.11 m/s^2, and the automobile an acceleration of 3.41 m/s^2. The automobile overtakes the truck after the truck has moved a distance 41.0 m How much time does it take the automobile to overtake the truck?
