A car accelerates from rest at a constant rate of 2 m/s2 for 5 s. a) What is the speed of the car at the end of that time? b) How far does the car travel in this time?
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Expert's answer
2012-09-07T10:35:55-0400
a) The equation for the speed is: V(t) = V0 + a * t = a * t, as V0 = 0. Then V(5) = 2 * 5 = 10 m/s.
b) The equation for the covered distance is: S = V0 * t + a * t^2 / 2 = a * t^2 / 2, as V0 = 0. Then S = 2 * 5^2 / 2 = 25 m.
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