Question

A bus starts to move from rest.if its velocity becomes 90 km per hour after 8 s, calculate its acceleration.

Answer 1

Answer:

the answer is 3.125 m/s^2

Explanation:as given 90 km/hour so we first need to convert to m/s.

so 1 km=1000m and 1 hour =3600s

so 90 km/hour=90000/3600=25m/s

now accelaration =v-u/t

so after putting the values we get a=25/8 m/s=3.125m/s ^2

thats all.thank u

Answer 2

Answer:

acceleration= rate of change of velocity

                   

Explanation:

a=u+v /t         u=0 v=25m/s  t=8secs

convert 90km/hr to m/s

90 into 5/18=25m/s

a=v+u/t

a=0+25/8

a=3.125m/s^2