Question

a bus decreases its speed from 80 km per hour to 60 km per hour in 5 seconds.Find the acceleration of the bus.

Answer 1

Hey!

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u= 80 km/h = 22.222 m/s
v= 60 km/h = 16.667 m/s
t= 5 s
a= ?

v - u = at
16.667 - 22.222 = a×5
−5.555 = 5a
a= -1.111 m/s^2

NOTE-:

u= initial velocity
v= final velocity
t= time
a= acceleration

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Hope it helps...!!!

Answer 2

Initial speed: 80km/h
= 80× 5/18
= 22.2 m/s
Final speed: 60km/h
= 60× 5/18
= 16.7 m/s
Time: 5 seconds
Acceleration: v-u/t
a= 16.7 - 22.2/ 5
a= -5.5/5
a= -1.1 m/s2
I HOPE IT WILL HELP U