Question

A bus decrease its speed from 80km h^-1to 60km h^-1in 5s . Find the acceleration of the bus

Answer 1

Answer:

a=(80-60)/5

a=(v-u)/5

Answer 2

Acceleration = (Final velocity - Initial velocity) / Time

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

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

Time = 5 s

Acceleration = (16.67 - 22.22) / 5 = -5.5555 / 5 = - 1.111 m/s²