Question

A driver applies brakes and slow down the velocity of the bus from 90km/h to 60km/h in 5 sec calculate acceleration of the bus

Answer 1

Explanation:

u= initial velocity = 90

v= final velocity = 60

t= time taken = 5 seconds

but first we need to convert velocities into meter per second cause time is in seconds

km/h to m/s = multiply by 5/18

u = 90×5/18= 25

u = 25m/s

v= 60×5/18=

v = 16.67

acceleration = V-u/t

$\frac{16.67 - 25}{5} = 11.67$

so the acceleration = 11.67m/s