Question

9. Two trains, which are moving along different
tracks in opposite directions are put on the
same track by mistake. On noticing the
mistake, when the trains are 300m apart the
drivers start slowing down the trains .the graphs given below show decrease in their velocities as function of time the separation between the trains when both have stopped is ​

Answer 1

Answer:

Their drivers, on noticing the mistake, start slowing down the trains when the trains are 300 m ... A.7 show their velocities as function of time as the trains slow down. ... Distance moved by train 1= Area under v−t graph.

Top answer

(D) Distance moved by train 1 = Area under v - t graph S1 = 12 × 10 × 40 = 200m Similarly S2 = 12 × 20 × 8 = 80m Separation = 300 - ( S1 + S2 ) = 300 ... 

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