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  5. Time and Motion

9th Class Science Time and Motion Question Bank MCQs - Motion

  • question_answer
    A bridge is 400 m long. A 150 m long train crosses the bridge at a speed of 50 m/s. Time taken by the train to cross it.

    A) 5 s               

    B) 8 s

    C) 6 s                                           

    D) 11 s

    Correct Answer: D

    Solution :

    [d] Total length of path covered by train
           =  400 +150 = 550 m
    Time taken by train to cross the bridge
    =\[\frac{Total distance}{Speed}=\frac{550}{50}=11\operatorname{s}\]


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