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JEE Main & Advanced Physics Vectors Question Bank Relative Velocity

  • question_answer
    A thief is running away on a straight road on a jeep moving with a speed of 9 m/s. A police man chases him on a motor cycle moving at a speed of 10 m/s. If the instantaneous separation of jeep from the motor cycle is 100 m, how long will it take for the policemen to catch the thief

    A)                 1 second

    B)                             19 second

    C)                 90 second

    D)                             100 second

    Correct Answer: D

    Solution :

                    Relative speed of police with respect to thief                 \[=10-9=1\,m/s\]                 Instantaneous separation = 100 m                 Time = \[\frac{\text{distance}}{\text{veclotiy}}=\frac{100}{1}=100\sec .\]


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