Question

A bus driver applies the brakes and slows down the velocity of the bus from 60km/h to 30km/h in 5s . Calculate the acceleration of the bus

Answer 1

Here ,

The initial velocity (u) of bus = 60km/h = 60×5/18 m/s = 300/18 m/s = 50/3m/s

The Final velocity (v) of bus = 30km/h = 30×5/18 m/s = 150/18 = 50/6 m/s

Time taken = 5seconds

So, The formula for Acceleration is =

(Final velocity- Initial Velocity )/Time taken

= (50/6 - 50/3) / 5

= (-8.3333)/5

= -1.666 m/s²

So, the bus is decelerating at a rate of -1.666 m/s²