A 1200 kg automobile crashes into a brick wall collapsing


A 1200 kg automobile crashes into a brick wall, collapsing thefront end 1.5 meters. If the averge retarding force applied by the brick wall to the automobile is 2000 N through out the entire time of crash, what was the speed of the automobile just before hitting the wall?

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Physics: A 1200 kg automobile crashes into a brick wall collapsing
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