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JEE Main & Advanced Physics Vectors Question Bank Relative Velocity

  • question_answer
    A 120 m long train is moving towards west with a speed of 10 m/s. A bird flying towards east with a speed of 5 m/s crosses the train. The time taken by the bird to cross the train will be                                      [Manipal 2002]

    A)                 16 sec   

    B)                 12 sec

    C)                 10 sec   

    D)                 8 sec

    Correct Answer: D

    Solution :

                    Relative velocity \[=10+5=15\,m/s\].                                 Time taken by the bird to cross the train\[=\frac{120}{15}=8\sec \]


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