physics
posted by mark .
The front 1.20 m of a 1,350kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.
(a) If a car traveling 21.0 m/s stops uniformly in 1.20 m, how long does the collision last?
s
(b) What is the magnitude of the average force on the car?
N
(c) What is the magnitude of the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity.
g

physics 
Chanz
a) x = 1/2(vo + vf)t
vf is zero
b)Ft = change mv
mv final is again zero
c) F = ma
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