Posted by **arcos15** on Wednesday, September 19, 2012 at 2:43pm.

A car traveling 56 km/h is 22.0 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.15 s later.

(a) Assuming constant acceleration, what was the magnitude of the car's acceleration before impact?

_______ m/s2

(b) How fast was the car traveling at impact?

________ m/s

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