Given data
*The initial speed of the helicopter is u = 25 m/s
*The final speed of the helicopter is v = 60 m/s
*The given time is t = 5 s
The formula for the acceleration of the helicopter is given as
[tex]a=\frac{v-u}{t}[/tex]Substitute the values in the above expression as
[tex]\begin{gathered} a=\frac{60-25}{5} \\ =7m/s^2 \end{gathered}[/tex]