Question

A bus is moving with a velocity of 60 km/hr is brought to rest in 20 seconds by applying the brakes. Find its acceleration.​

Answer 1

Answer:

in it question

u=60km/h

v=0km/h

t=20sec

a=?

v=u+at

0=60+20a

-60=20a

a=-60/20

=-3m/s^2

Answer 2

Explanation:

initial velocity,u=60km/hr=60×1000/60×60=100/6

Final velocity,v=o

time,t=20

acceleration,a=?

according to newton,s first law

v=u+at

0=100/6+a20

a=_100/6/20=_0.833