Answer:

change in speed = 80-60 = 20km/h = 5.5m/s

Step-by-step explanation:

acceleration = change in speed/time

= 5.5/5 = 1.1 m/s square

Initial velocity of the bus  \: u=80kmh−1

80×185=22.22m/s

60×185=16.66m/s

Final velocity, V=60km/h−1

Time taken to decrease the velocity of bus, t=5 seconds.

Acceleration, a=5 seconds.

Velocity, a=tv−u

  =516.66−22.22=−1.112ms−2

yeah, always there for frnds ( ꈍᴗꈍ)