Question

A bus decreases it's speed from 80 km/h to 60km/h in 5 seconds. Find the acceleration of the bus? Hai

Answer 1

U= initial velocity= 80 km/h = 22.2 m/s

v= final velocity = 60 km/h = 16.7 m/s

t= time = 5 s

a= acceleration = ?

a=v-u/t

a= 16.7-22.2/5

a= -5.5/5

Therefore, a=-1.1 m/s^2

Hope it helps u...

Answer 2

${\huge {\mathfrak{Answer :-}}}$

➡️ Acceleration is

= (60 - 80)/(5/3600) km/h^2

= (-20 * 3600) / 5 km/h^2

= - 14400 km/h^2.

➡️ Or like this,

Change in speed is

= 60 - 80 km/h

= - 20 km/h

= (-20 * 1000) / 3600 m/s

= - 5.5 m/s

So, Acceleration is

= - 5.5 / 5 m/s

= - 1.1 m/s

That's it..