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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
    An airplane accelerates down a runway at \[3.2\,\,m\,\,{{s}^{-2}}\] for \[32.8\,\,s\] until it finally lifts off the ground. Determine the distance travelled before take-off.

    A) \[1323\,\,m\]     

    B)        \[1527\,\,m\]

    C) \[1721\,\,m\]       

    D)        \[1931\,\,m\]

    Correct Answer: C

    Solution :

     \[S=ut+\frac{1}{2}a{{t}^{2}}=0\times 32.8+0.5\times 3.2{{(32.8)}^{2}}\]             \[=0.5\times 3.2=1.6\times 1075.84=1721\,\,m\]


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