Question

A driver of train 'A' travelling at a speed
of 54 km/hr, and then it retards and
stops
5 sec. another train 'B' is
travelling on parallel track with a speed
of 36 km/hr . then applies brake and stopes
in 10 sec. on the v-t graph plot
the graph of both the train and also
find the dist in both cases, travelled
by the train after brakes were applied.​

Answer 1

The blue graph is for the train which stops in 5 s and had an initial velocity of 54 km/h (= 15 m/s)

Deceleration of this train is = 15/5 = 3 m/s2

The Red graph is for the train which stops in 10 s and had an initial velocity of 36 km/h (= 10 m/s)

Deceleration of this train is = 10/10 = 1 m/s2