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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2010

  • question_answer
        A steel ball is dropped from a height h and it makes a perfectly elastic collision with a horizontal plane. Following its initial release, it will make periodic motion with frequency

    A)  \[2\pi \sqrt{\frac{g}{h}}\]                           

    B)  \[2\pi \sqrt{\frac{h}{g}}\]

    C)  \[\frac{1}{2}\sqrt{\frac{g}{2h}}\]                             

    D)  \[\frac{1}{2}\sqrt{\frac{2h}{g}}\]

    Correct Answer: C

    Solution :

                    Time period of oscillation \[T=2t=2\sqrt{2h/g}\] \[\therefore \]  \[f=\frac{1}{T}=\frac{1}{2}\sqrt{\frac{g}{2h}}\]


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