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  5. Time and Motion

9th Class Science Time and Motion Question Bank Motion

  • question_answer
    A car moving on a road with uniform acceleration covers \[20\,\,m\] in the first second and \[30\,\,m\] in the next second. What is its acceleration?

    A) \[20\,\,m\,\,{{s}^{-2}}\]                       

    B) \[10\,\,m\,\,{{s}^{-2}}\]  

    C) \[30\,\,m\,\,{{s}^{-2}}\]           

    D)        \[5\,\,m\,\,{{s}^{-2}}\]

    Correct Answer: B

    Solution :

    \[a=\frac{{{S}_{2}}-{{S}_{1}}}{\Delta {{t}^{2}}}=\frac{30-20}{{{1}^{2}}}=\frac{10}{1}m\,\,{{s}^{-2}}\]


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