.
Its driver applies the brakes and the train retards uniformly; train B stops in
10 seconds. Plot speed-time graphs for both the trains on the same axis. Which
of the trains travelled farther after the brakes were applied?
Answer:
For train A, the initial
velocity,
Final velocity, 
and time,
Foe time B, 
Speed-time
graph for train A and B are shown in the figure.
Distance travelled by train
A = Area under straight line graphs RS
= Area of AORS
Distance
travelled by train B = Area under PQ=Area of AOPQ
Thus, train B travelled farther after the brakes were applied.
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