Question

19. A train starting from rest attains a velocity of 7 km/h in 5 min. Assuming that the acceleration is uniform, find (i) the acceleration and (ii) the distance travelled by the train for attaining this velocity.​

Answer 1

Answer:

v=u+at

a=(v-u)/t

v=72 km/h

=20m/s

u=0

t=5*60 sec =300sec

by putting values of v,u,t in

a=1/15 m/s2

s=ut +(1/2)at2

=0+(1/2)(1/15)(300)(300)

=3km