When Seat Belts Cause Injuries скачать в хорошем качестве

When Seat Belts Cause Injuries

Use code 50DARKSCIENCE to get 50% OFF plus free shipping on your first Factor box at https://bit.ly/3BqbVD6 Support me on Patreon:   / qfs   Follow me on Twitter and Facebook:   / realqfs     / questionsforsciencepage   Calculations: A car weighing 800 kg is traveling at 60 miles per hour (26.8 m/s) when it loses traction on a curve and collides with a house wall. By the time of impact, the car has decelerated to 40 miles per hour (17.9 m/s). The car breaks through the wall and comes to a stop 2 meters inside the house. The car's kinetic energy at 17.9 m/s is calculated as (0.5)(800 kg)(17.9 m/s)^2 = 128,160 Joules. The driver's kinetic energy is (0.5)(60 kg)(17.9 m/s)^2 = 9,612 Joules. After running into the side of a building, the car comes to rest after moving 2 meters forward. The average force exerted on the driver wearing his seat belt is (9,612J)/(2 meters) = 4,806 N. Average acceleration experienced by the driver is a = F/m; so (4,806 N)/(2 meters) = 80 m/s^2.