Question

A driver applies the brakes and slows down the velocity of the bus from 80 k/ h to 60 km/h in 5 sec. Calculate the acceleration of the bus.

Answer 1

Explanation:

initial velocity (u) = 80 km/h = 22.22 m/s

final velocity (v) = 60 km/h = 16.67 m/s

Time period (t) = 5 sec

we know,

v = u + at

16.67 = 22.22 + 5a

-5.55 = 5a

a = - 1.11

-ve sign shows retardation.

Hope you got it.

Mark this as brainlist !

Answer 2

Answer:

-4000 meters per square seconds

Explanation:

change km/hr to m\s by multiplying by 100

60,000 m/s-80,000 m/s= -20,000 m\s

then

-20,000 m\s\5 s= -4,000 m\s\s

hope you got it....