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9th Class Science Gravitation and Floatation Question Bank Gravitation and Pressure

  • question_answer
    A body is projected vertically upwards with a velocity of\[96\,\,ft\,\,{{s}^{-1}}\]. How long will the body remain in air?\[(g=32\,\,ft\,{{s}^{-2}})\]

    A) \[3s\]                

    B)        \[6s\]  

    C) \[9s\]                

    D)        \[12s\]

    Correct Answer: B

    Solution :

     \[v=u+gt,\,\,t=\frac{2u}{g}=\frac{2\times 96}{32}=6\,\,s\]


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