A girl running a race accelerates at 2.5 ms-2 for the first 4 s of the race. How far does she travel in this time?
Acceleration = a =2.5 ms-2
Time of Acceleration = t = 4 s
Initial velocity = u = 0 ms-1
Now, from the equations of motion we know that,
s = 20 m
Hence, the girl travels 20 m in this time.