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NEET Sample Paper NEET Sample Test Paper-7

  • question_answer
    A particle is projected from point P with velocity \[5\sqrt{2}m{{s}^{-1}},\] perpendicular to the surface of a hollow right angle cone whose axis is verticle. It colides at Q normally. The time of the flight of the particle is:

    A)  1S                  

    B)  \[\sqrt{2}S\]

    C)  \[2\sqrt{2}S\]             

    D)  2S

    Correct Answer: A

    Solution :

    From the equation of motion in verticle direction, \[t=\frac{u\sin \theta }{g}\,\,\,\left( as,\,\,\sin \theta =\sin {{45}^{o}}=\frac{1}{\sqrt{2}} \right)\] \[=\frac{5\sqrt{2}}{10\times \sqrt{2}}=\frac{1}{2}S\] Time of flight,      \[T=2t=2\times \frac{1}{2}\]                                 \[T=1S\]


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