Posted by **Aestas** on Thursday, March 31, 2011 at 2:51pm.

A 1000 kg car can accelerate from rest to v = 85 km/hr in a time t = 7.4s.

If, instead the power of the car is smaller by a factor of .4 and the car accelerates for the same amount of time, by what factor will the maximum speed decrease?

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