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BCECE Engineering BCECE Engineering Solved Paper-2002

  • question_answer
    An aeroplane is moving with a horizontal velocity u at a height h. The velocity of packet dropped from it on the earths surface will be:

    A)  \[\sqrt{{{u}^{2}}-2gh}\]               

    B)         \[2gh\]

    C)  \[\sqrt{2gh}\]                  

    D)         \[\sqrt{{{u}^{2}}+2gh}\]

    Correct Answer: D

    Solution :

    Since, velocity is vector quantity, its horizontal component is \[u\]and vertical component is v and from equation of motion \[v=\sqrt{2gh}\] Taking the resultant of \[u\]and \[v\] \[R=\sqrt{{{u}^{2}}+{{v}^{2}}}\] \[=\sqrt{{{u}^{2}}+2gh}\]


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