How much retardation must be applied to stop a bus running at a uniform speed of 40km/h in 5 seconds?

3 answers

Convert km/h to m/s:
40 km/h * 1000 m/km * (1/3600) h/s = ____ m/s

Acceleration = Δ velocity / Δ time
= (0 m/s - ____ m/s) / 5 s
= ____ m/s ²

-20/9