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  • A bus decreases its speed from 80km/h to 60km/h in 5 secs. find the acceleration of the bus?

A bus decreases its speed from 80km/h to 60km/h in 5 secs. find the acceleration of the bus?

Answers (3)

Given- u= 80km/hrs

V= 60km/hrs

T=5sec

First change km/hrs in m/sec

80km/hrs=22.22m/sec

60km/sec=16.66m/sec

a= v-u/t

16.66m-22.22m/5sec

-5.56m/5sec= -1.112m s^-2

Posted by

Anuj Srivastava

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According to the formula of accrelation,          a=v-u/t

Here, 

u=80 km/h= 22.22m/s (short form of second is s, not sec) 

v=60 km/h= 16.66m/s

t=5s

So, accerelation= (16.66-22.22)/5 ms^-2

=-5.56/5 ms^-2

=-1.112 ms^-2 (ans)

*Note: Negative accerelation is called regelation, so,if in the question it was asked to find the regelation the answer would be 1.112 and there would be no negative sign

Posted by

Ipshit Paul

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Posted by

NIYATI

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