Question

A bus decreases it's speed from 72km/hr to 54km/hr in 5 Dec. Find the acceleration of the dus

Answer 1

◆Hi there,◆
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u=72km/h= 72×5/18= 20m/s
v=54km/h= 54×5/18 =15m/s
t=5sec.
We know that,
a=v-u/t
a=(15-20)/5
a= (-5)/5
【a= -1 m/s²】
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HOPE THIS HELPS YOU:-))

Answer 2

your answer is here:

initial velocity : 72 km/h

final velocity: 54 km/h

now firstly change them into cm/s

after changing we get

initial velocity:   20 cm/s

final velocity: 15 cm/s

as we know acceleration : final velocity- initial velocity/time taken

so, a= 15-20/5

a=-5/5

a=-1 cm/s
hope it will helpful to you!!!!!!!