Magnitude of acceleration = (change of speed) / (time for the change)
Change of speed = (speed at the end) - (speed at the start)
Change of speed = (18 m/s) - (0 m/s) = 18 m/s
Time for the change = 22 sec
Magnitude of acceleration = (18 m/s) / (22 sec)
Magnitude of acceleration = 0.818 m/s²
