A car moving at 20.0 m/s (72.0 km/h) crashes into a tree. Find thmagnitude of the average force acting on a passenger of mass 70 kg in eatof the following cases. (a) The passenger is not wearing a seat belt. Helbrought to rest by a collision with the windshield and dashboard that las2.0 ms. (b) The car is equipped with a passenger-side air bag. The forcedto the air bag acts for 45 ms, bringing the passenger to rest.( (a) 7.0 x 10° N (b) 3.1 x 10' N)

Solution: The initial velocity of the car is vi = 20 m/s The final velocity of the car is vf = 0 m/s…

A car moving at 20.0 m/s (72.0 km/h) crashes into a tree. Find th magnitude of the average force acting on a passenger of mass 70 kg in eat of the following cases. (a) The passenger is not wearing a seat belt. He brought to rest by a collision with the windshield and dashboard that las 2.0 ms. (b) The car is equipped with a passenger-side air bag. The force du to the air bag acts for 45 ms, bringing the passenger to rest. ( (a) 7.0 x 10° N (b) 3.1 x 10' N)

A car moving at 20.0 m/s (72.0 km/h) crashes into a tree. Find th magnitude of the average force acting on a passenger of mass 70 kg in eat of the following cases. (a) The passenger is not wearing a seat belt. He brought to rest by a collision with the windshield and dashboard that las 2.0 ms. (b) The car is equipped with a passenger-side air bag. The force du to the air bag acts for 45 ms, bringing the passenger to rest. ( (a) 7.0 x 10° N (b) 3.1 x 10' N)