if a car accelerates from rest at a constant 5.3 m/s^2, how long will it take to reach 28 m/s

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Given: a=5.3 m/s^2 v1 = 28 m/s Solution: v0 = 0 m/s * v1 = v0+at v1-v0 = at (v1-v0)/a = t For the values given and assumed (*) we get t = (28-0)/5.3 = 5.3 s What we have calculated is the difference in speed we want to achieve divided by how quickly we can increase the speed.