Question

a bus decreases its speed from 80 kilometre per hour -1 to 60 km per hour -1 in 5 seconds find the acceleration of the bus​

Answer 1

Here,

u=80km/hr=200/9m/s

v=60km/hr=50/3m/s

t=5s

a=v-u/t

a=50/3-200/9/5

a= -10/9m/s²

Answer 2

Answer:

1 kmph= 5/18 m/s

Therefore, 80 kmph=80*5/18=22.22 m/s

                  60 kmph=60*5/18=16.66 m/s

therefore, acceleration a=dv/dt

                                         =16.66-22.22/5

                                         =-5.56/5

                                         =-1.11 m/s²