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Standard IX

History

The Ottoman Empire

A train is mo...

Question

A train is moving eastwards with a velocity of $10 m / s$ . On a parallel track another train passes with a velocity of $15 m / s$ eastwards. To the passengers in the second train, the first train will appear to be moving with a velocity.

5 m / s

eastwards

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25 m / s

eastwards

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5 m / s

westwards

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20 m / s

westwards

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Solution

The correct option is C $5 m / s$ westwards
Step 1: Draw the diagram as per the given information.

Step 2:
Find the velocity of $A$ with respect to $B$ $({\to V}_{A B})$ .
${\to V}_{A B} = {\to V}_{A} - {\to V}_{B}$
${\to V}_{A B} = 10 - 15$
${\to V}_{A B} = - 5 m / s$
Hence,
${\to V}_{A B} = 5 m / s$ westwards.
Final Answer: (a)

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The Ottoman Empire

Standard IX History

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

The correct option is C 5 m/s westwardsStep 1: Draw the diagram as per the given information. Step 2: Find the velocity of A with respect to B (→VAB). →VAB=→VA−→VB →VAB=10−15 →VAB=−5 m/s Hence, →VAB=5 m/s westwards. Final Answer: (a)

A train is moving eastwards with a velocity of $10 m / s$ . On a parallel track another train passes with a velocity of $15 m / s$ eastwards. To the passengers in the second train, the first train will appear to be moving with a velocity.