Question #8221
A car moving at 100 km / hour, crashed into a concrete wall that doesn't move. How much time it takes to stop the car and how much its acceleration?
nb: I think this question isn't exhaustive/complete, but maybe you have another ideas. :)
nb: I think this question isn't exhaustive/complete, but maybe you have another ideas. :)
Expert's answer
V=Vo+at
0=Vo+at => Vo=-at. And t=0, so a=-infinity
0=Vo+at => Vo=-at. And t=0, so a=-infinity
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