A cara accelerates uniformly from rest to a speed of 21.9 km/h in 8.5 s. Find the distance it travels during this time.
because it starts from rest and accelerates uniformly, the average velocity is 1/2 the final velocity
convert the km/h into m/s [multiply by 1000/3600]
the distance is the average velocity, multiplied by the time (8.5 s)