A car travelling at 72 km/h hits a wall and comes to a stop.The average deceleration experienced by the car in this duration is 6g (use g=10 m/s2).The belted passenger, weighing 1000 N, is restrained by the belt that exerts a constant force of 4 kN.The steering wheel of the car is 250 mm from the occupant.\tWill the seat belt provide adequate protection to the occupant against hitting the steering wheel? If not, with what velocity will the occupant hit the steering wheel?(4+3) marks\tHad the distance between the occupant and the steering wheel been 150 mm, and an air bag had to be used for supplemental protection, at what time should the bag be triggered if the gas to fill the bag of volume is produced by chemical reaction at a rate of 2.5 kl/sec.Assume that the bag is spherical in shape and has a radius of 250 mm.

srinath , 10 Years ago

Grade 12th pass