Question

(a) Compute the impulse necessary to bring to rest the 47.0 kg driver of an automobile initially moving at 26.0 m/s.


(b) Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 11.6 s interval.


(c) Find the average force if the car is stopped in a collision that brings the driver's seat to rest in 0.100 s, assuming the driver is restrained by a seat belt.


What are the functions of seat belts and air bags in a collision?

Answer 1

(as Impulse reg. a change in momentuan 47 x 26 - 12 22 N-m 26 2.24 m/s2 deaccn= a= - (b) deacon = as he - 2.24 mis Faug - m a 47 x 2,24 - 105.34 N cel deacena a= 26 = 260 m/s2 12220 N. 2220 M AND Taug = maa 47x 260 time Seat belts and air bags increa duration of the person to come to rest they decreasing the value of average force acting on person and they protecting him a