Question

A bus decreases its speed from 80 km/h to 60 km/h in 5 sec. Find the acceleration of the bus.​

Answer 1

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Answer 2

Here we have ,u = 80 km / h, v= 60 km/h , t= 5 sec

We know that v = u + at

= 60 km/ h = 80 km/ h + a × 5 s

= 60 km/ h - 80 km/ h = a × 5 s

= - 20 km/h = a × 5 s

= a = - 20 km/ h / 5s

= a = - 4 km/h/s

Therefore acceleration = - 4 km/h/s or - 1.1 m/s²