Given:
Initial velocity = 0
Acceleration = 4.8 m/s
Time = 15 seconds
Asked: Velocity of the plane at take off or Final velocity
Solution:
Acceleration = [tex] \frac{ v_{f} - v_{i} }{t} [/tex]
4.8 m/s² = [tex] \frac{ v_{f}- 0}{15 s} [/tex]
4.8 m/s² (15 s) = [tex] v_{f} [/tex]
72 m/s = [tex] v_{f} [/tex]