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NEET Sample Paper NEET Sample Test Paper-23

  • question_answer
    A projectile is thrown from ground which of the following graph represents the variation of its height \[(h)\] with time (t)

    A)                                  

    B)

    C)                         

    D)  

    Correct Answer: C

    Solution :

    Let the vertical component of the initial velocity of the projectile be\[{{u}_{y}}.\] \[\therefore \]    \[h={{u}_{y}}t-\frac{1}{2}g{{t}^{2}}\] \[\frac{dh}{dt}={{u}_{y}}-gt\]             or,        \[\frac{{{d}^{2}}h}{d{{t}^{2}}}=-g\] As the second derivative is negative so, h versus t curve is convex upwards. Hence, the correction option is [c].


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