The National Transportation Safety Bureau indicates that a person in a car crash has a reasonable...
The National Transportation Safety Bureau indicates that a person in a car crash has a reasonable chance of survival if his or her acceleration is less than 300 m/s2. Suppose that the mass of a car is 1200 kg .
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Homework Answers
a) the deceleration required is 300 m/s^2 (as the person inside the car will be accelerated by same amount of force due to inertia)
There fore the for requiredvto stop F= ma
= 1200*300
=360000
=360kN
b) v^2 - u^2 = 2* a* s
u= 21 m/s v=0
-21^2 = -2*300*S
S= 42/600
S=0.07 m
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