Question

Avast driver applies the brakes and slows down the velocity of the bus from 60 kilometre per hour to 30 kilometre per hour in 5 seconds calculate acceleration​

Answer 1

Here ,

The initial velocity (u) of bus = 80km/h = 80×5/18 m/s = 200/9 m/s

The Final velocity (v) of bus = 60km/h = 60×5/18 m/s = 500/3 m/s

Time taken = 5seconds

So, The formula for Acceleration is =

(Final velocity- Initial Velocity )/Time taken

= (500/3 - 200/9) / 5

= {(1500-200)/9)/5

= 1300/9 × 1/5

= 260/9

= 28.8 m/s²

Answer → Acceleration is 28.8m/s²

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Answer 2

We need to apply the formula v - u ? t

Thus, v = 60 km/ ph

u = 30 km/ ph

t = 5 seconds

So (60 - 30) ? 5

30 ? 5

6 kms

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