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JEE Main & Advanced Physics Vectors Question Bank Relative Velocity

  • question_answer
    A 150 m long train is moving to north at a speed of 10 m/s. A parrot flying towards south with a speed of 5 m/s crosses the train. The time taken by the parrot the cross to train would be:                                          [CBSE PMT 1992]

    A)                 30 s       

    B)                 15 s

    C)                 8 s          

    D)                 10 s

    Correct Answer: D

    Solution :

                    Relative velocity of parrot with respect to train                 =\[5-(-10)=5+10=15\,m/\sec \]                 Time taken by the parrot\[=\,\frac{d}{{{v}_{\text{rel}\text{.}}}}=\frac{150}{15}=10\,\sec .\]


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