Question

A bus decreases its speed from
80 km h-' to 60 km h' in 5 s.
Find the acceleration of the bus.​

Answer 1

Answer:

answer below

Explanation:

A bus decreases its speed from 80 kilometres per hour to 60 km per hour in 5 seconds, find the acceleration of the bus.

Given that U= initial velocity= 80 km/h = 22.2 m/s

v= final velocity = 60 km/h = 16.7 m/s

t= time = 5 s

We have to find a= acceleration = ?

v = u+at

a = v – u/t

a = 16.7 – 22.2/5

= -5.5/5

Therefore, acceleration a = -1.1 m/s^2

The negative sign implies that the velocity is decreasing.

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Answer 2

Given :-

Initial velocity ,u = 80km/h

Final velocity ,v = 60km/h

Time taken ,t = 5 s

Hence, the acceleration of the bus is approximately 1.12 m/s²