The front 1.20 m of a 1,350-kg 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

1 answer

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