A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
Initial speed of the bus, u= 80 km/h = 80 x 5/18 m/s = 22.22 m/s
Final speed of the bus, v= 60 km/h = 60 x 5/18 m/s=16.66 m/s
Time take to decrease the speed, t= 5 s
Here, the negative sign of acceleration indicates that the velocity of the car
is decreasing.
