Question

a bus decreases its speed from 80 h-1 to 60 h-1 in 5s. Find the acceleration of the bus.
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Answer 1

u=80km/h = 80× (5/18) m/s

v=60km/h = 60 × (5/18) m/s

a = Δv/Δt = (60-80)×(5/18)/ 5 = (-20×5)/(5×18) = -10/9 m/s²