Calculate the acceleration. The change in velocity v – u = 30 – 22 = 8 m/s. The acceleration = change in velocity ÷ time = 8 m/s ÷ 4 s = 2 m/s 2. The change in velocity v – u = 40 – 0 ...

A school bus is travelling at 4 m/s. Its velocity then increases to 12 m/s. Calculate the average velocity of the bus over the journey. Final velocity = 12 m/s. Initial velocity = 4 m/s.