Question

A bus decreases its speed from 80 km per hour to 60 km per hr in 5 second . Find the acceleration.

Answer 1

Hey Mate ,

Here is the answer ,
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Initial speed(u) = 80 km/h or 22.2m/s
Final speed(v) = 60 km/h or 16.7 m/s
Time interval(t) = 5 seconds

Acceleration =  v - u 
                           t

                    = 16.7-22.2 
                           

                    = -5.5 
                         5

                   = -1.1m/s
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Hope this helped you !!
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Answer 2

Hi,

Here is your answer,

u(initial velocity) 80km/h = 22.2 m/s

v(Final velocity) 60km/h = 16.7 m/s

Time = 5 s

We need to find the acceleration 

Apply the Acceleration formula,

A = v - u / t

A = 16.7 - 22.2 / 5

A = - 5.5 / 5

A = -1.1 m/s² 


Hope it helps you !