A Train Is Moving Eastwards With A Velocity Of 10 M/sec. On A Parallel Track Another Train Passes With A Velocity 15 M/sec Eastwards. To The Passengers In The Second Train The First Train Appears To Be Moving With A Velocity.

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A train is moving eastwards with a velocity of 10 m/sec. On a parallel track another train passes with a velocity 15 m/sec eastwards. To the passengers in the second train the first train appears to be moving with a velocity.


Correct option is



         = 10m/sec – 15m/sec

         = –5m/sec. westward

Because +ve sign is associated with eastward direction.



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