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J & K CET Medical J & K - CET Medical Solved Paper-2013

  • question_answer
    A projectile is thrown with initial velocity\[{{\upsilon }_{0}}\]and angle\[30{}^\circ \]with the horizontal. If it remains in the air for 1 s, what was its initial velocity?

    A)  19.6m/s           

    B)  9.8 m/s

    C)  4.9 m/s            

    D)  1 m/s

    Correct Answer: B

    Solution :

     Time of flight\[T=\frac{2u\sin \theta }{g}\] Given, \[u={{v}_{0}},T=1s,\theta =30{}^\circ ,g=9.8\,m/{{s}^{2}},\] \[{{v}_{0}}=u=g=9.8m/s\]


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