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Fig. 50 A vehicle with passengers not wearing safety belts hits a wall. Please first read and note the introductory information and heed the WARNINGS
The physical principles of a frontal collision are simple. Both the moving vehicle and the passenger possess energy ⇒ fig. 49 , which varies with vehicle speed and body weight. Engineers call this energy “kinetic energy.” The higher the speed of the vehicle and the greater the vehicle's weight, the more energy has to be Vehicle speed is the most significant factor. If your speed doubles (for example, from 15 mph to Because the occupants of the vehicle in the above example are not using safety belts, they are not entire kinetic energy will be absorbed by impact with the wall ⇒ fig. 50 . The same principles apply to people in a vehicle that is in a frontal collision on the highway. Even at Of course, the laws of physics don't apply just to frontal collisions; they determine what happens in all What happens to passengers not wearing a safety belt
Fig. 51 The unbelted driver is thrown forward. |