PrintCalculator Periodic Table Question 32 of 33 Mape University Physics present

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PrintCalculator Periodic Table Question 32 of 33 Mape University Physics presented by Sapling Leaming During a front-end car collision from 49.5 km/h and with air bags inflated, the acceleration limit for the chest is 60g as the car comes to rest. The trunk or chest area of the body comprises about 43% of body weight. Draw a free-body diagram of a person during the crash centered on the origin of the axes. The diagram does not need to be drawn to predise scale. Assume the car is traveling from left to right along the x-axis For how much time does this acceleration last, assuming Number What force in newtons does the air bag exert on the chest of a 78.5 kg person? Number

Explanation / Answer

a) v = 49.5 km/h = 13.75 m/s

a = 60g = 60*9.8 = 588

t = v/a = 13.75 / 588

t = 0.0234 seconds

b) We need to consider chest area given in percentgae

F = 0.43*78.5*588

F = 19847.9 N

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