Question

A bus moving with a velocity of 60 km per hour is brought to rest in 20 seconds by applying brakes find its acceleration

Answer 1

u = 60km/h = 60 × 5/18 = 50/3m/s

v = 0

t = 20s

a=?

v = u + at

0 = 50/3 + a×20

-50/3 = 20a

a = - 50/60 = - 0.83m/s^2


Thanks

Answer 2

u= 0
V=60km/hr
t=20 sec
V=u plus at
60= 0 plus a * 20
a=60/20 = 3
Therefore acceleration = 3 km/hr