Velocity along the centreline of the nozzle of length L is given by 

\(V = 2t \left [1 - \frac{x}{2L} \right ]^2~\)  

v = velocity (m/s), t = time (s), x = distance (m)

Find the magnitude of total acceleration at a distance of 0.5 m and at 3 sec and use L = 0.8 m. (Round off to two decimal places,neglecting sign of acceleration)