Question

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

Answer 1

Hi !

Initial velocity = u = 80 km/hr = 80*5/18 = 22.22 m/s

Final velocity = v = 60 km/hr = 60*5/18 = 16.67 m/s

Time  = t = 5 sec

Acceleration = a = ?

a = v - u/t
   = 16.67 - 22.22/5
   = -5.55/5
   = -1.11 m/s²

Acceleration of the bus is -1.11 m/s²

Answer 2

Answer:

Given, initial velocity(u)= 80km/hr= 22.22m/sec

Final velocity(v)= 60km/hr= 16.66m/sec

Time(t)=5 sec

Acceleration (a)= v-u÷t

=22.22-16.66÷5

=-1.112 m/sec

Hope it helps