Question

A car started from rest, achieved the velocity of 25 m/s with a uniform aceleration of 1.25 m/s^2, find the time taken by the car to achieve this velocity.

Answer 1

• $v = 0 \: \: \: u = 25ms { }^{ - 1 \: \: }a = 1.25ms {}^{ - 2} \\ from \: t he \: first \: equation \: of \: motion \\ \: \: \: \: we \: know \: that \\ v = u + at \\ 0 = 25 + 1.25t \\ 25 = 1.25t \\ t = \frac{25}{1.25} \\ t = \frac{250}{125 } \\ t = 2s \\ hence \: time \: taken \: by \: car \: to \: achieve \: the \: velocity \: is \: 2s$