A particle of mass $m$ moving with a speed $v$ hits elastically another stationary particle of mass $2\ m$ in a fixed smooth horizontal circular tube of radius $R$. Find the time when the next collision will take place?

814-730

  • A

    $\frac{{\pi R}}{v}$

  • B

    $\frac{{2\pi R}}{v}$

  • C

    $\frac{{4\pi R}}{v}$

  • D

    $\frac{{6\pi R}}{v}$

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