RAJASTHAN PMT Rajasthan - PMT Solved Paper-2003

  • question_answer A mass of 30 kg is suspended from a spring of spring constant 15 N/m. The time period of vertical oscillations of mass is

    A)  \[\frac{3\pi }{\sqrt{2}}s\]                            

    B)  \[2\pi \sqrt{2}\,s\]

    C)  \[\pi \sqrt{2}\,s\]           

    D)         \[2\sqrt{2}\,s\]

    Correct Answer: B

    Solution :

    For mass-spring system, time period \[T=2\pi \sqrt{\frac{m}{k}}=2\pi \sqrt{\frac{30}{15}}\] \[=2\pi \sqrt{2}\]second.

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