JEE Main & Advanced JEE Main Paper (Held On 26 May 2012)

  • question_answer
    A ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bounces up vertically. Neglecting subsequent motion and air resistance, which of the following graph represents variation between speed (v) and height (h) correctly?   JEE Main Online Paper (Held On 26-May-2012)  

    A)  

    B)  

    C)                

    D)  

    Correct Answer: D

    Solution :

    When a ball hits the ground vertically then some of its energy is lost due to which it bounces back to lesser height with less velocity. The energy of the ball keep on decreasing with time and finally it become zero. Due to this variation of velocity with height can be represented as follows :


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