Question

A bus driver applies the brakes and slow down the velocity of the bus from 60 kilometre per hour to 30 kilometre per hour in 5 seconds. calculate the acceleration of bus express your answer in SI units​

Answer 1

Answer:

acceleration  = -5/3 m/$s^{2}$ or decceleration =  5/3 m/$s^{2}$

Explanation:

final  velocity, v = 30 km/hr =  25/3 m/sec

initial velocity, u = 60 km/hr =  50/3 m/sec

applying equation of motion ⇒

    v = u + a × t

    50/3 = 25/3 + a × 5

    -25/3 = a × 5   ⇒  a = -5/3 m/$s^{2}$