Question

A bus decreases its speed from 80 km/h to 60 km/h in 5s find the acceleration of the bus

Answer 1

use first equation of motion to get the acceleration

Answer 2

Question : A bus decreases its speed from 80 km/h to 60 km/h in 5s. Find the acceleration of the bus.

Answer => -1.1 m/s^2

Step by step explanation :

We know that :

Initial velocity = u = 80 km/hrs

Final velocity = v = 60 km/hrs

Converting into m/s, multiply by 5/18

.°. u = 22.2 m/s

.°. v = 16.7 m/s

time = t = 5 sec

acceleration = a = ?

We know that,

a = (v - u) / t

= (16.7 - 22.2)/5

= -5.5 / 5

= -1.1

Thus, a = -1.1 m/s^2

Final answer :

Acceleration of the bus is -1.1m/s^2