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  3. 9th Class
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  5. Time and Motion

9th Class Science Time and Motion Question Bank Motion

  • question_answer
    A particle moving with an initial velocity of \[5\,\,m\,\,{{s}^{-1}}\] is subjected to a uniform acceleration of\[-2.5\,\,m\,\,{{s}^{-2}}\]. Find the displacement in the next \[4\] seconds.

    A) \[40\,\,m\]         

    B)        \[0\,\,m\]  

    C) \[20\,\,m\]         

    D)        \[60\,\,m\]

    Correct Answer: B

    Solution :

    \[S=ut+\frac{1}{2}a{{t}^{2}}=(5\times 4)+\frac{1}{2}\times (-2.5)\times 16=0\]


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