A bike accelerates uniformly from 12.5 km/h to 45 km/h in 2s. Calculate the acceleration.

Acceleration is the rate at which velocity changes over time, both in terms of speed and direction. A point or object moving in a straight line is accelerated if it accelerates or decelerates.

We are given that

u = 12.5 km/h = 3.4 m/s

v = 45 km/h = 9.8 m/s

t = 2 s

We know that, 

$\mathrm{a}=\frac{\mathrm{v}-\mathrm{u}}{\mathrm{t}}$

  $=\frac{9.8 {\mathrm{ms}}^{-1}-3.4 {\mathrm{ms}}^{-1}}{2\mathrm{s}}$

  $=3.2 {\mathrm{ms}}^{-2}$