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9th Class Science Time and Motion Question Bank Motion

  • question_answer
    A bike accelerates uniformly from rest to a speed of 7.10 m s-1 over a distance of\[35.4\,\,m\]. Determine the acceleration of the bike.

    A) \[0.412\,\,m\,\,{{s}^{-2}}\]       

    B)        \[0.512\,\,m\,\,{{s}^{-2}}\]

    C) \[0.612\,\,m\,\,{{s}^{-2}}\]       

    D)        \[0.712\,\,m\,\,{{s}^{-2}}\]  

    Correct Answer: D

    Solution :

    \[{{v}^{2}}-{{u}^{2}}=2aS,\,\,{{(7.10)}^{2}}-{{(0)}^{2}}=2a\times 35.4\] \[50.41=a\times 70.8,\,\,a=\frac{50.41}{70.8}=0.712\,\,m\,\,{{s}^{-2}}\]


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