Final speed of the bicyclist is 31 m/s.
We are given the initial speed of the bicyclist along with their acceleration. In this case the acceleration is uniform and linear.
Initial speed = 7 m/s
Acceleration = 6 m/s^2
Duration = 4 seconds
Final speed = Initial speed + Acceleration × Duration
Final speed = 7 m/s + 6 m/s^2 × 4 s
Final speed = 7 m/s + 24 m/s
Final speed = 31 m/s
