FearOfPhysics.com: Solve a Physics Problem

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After crunching the numbers, here's the answer. Remember that it all came from using a basic law of physics, which means that this answer (-3.6 m/s2) is based upon established facts, and laws about nature (not just estimates or guesses).

Based on the observations given in the problem, this must be what the acceleration of the car was before it hit the barrier.

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