An engine of a train, moving with uniform acceleration, passes the signal-post with velocity $u$ and the last compartment with velocity $v$. The velocity with which middle point of the train passes the signal post is

  • [JEE MAIN 2021]
  • A

    $\sqrt{\frac{ v ^{2}+ u ^{2}}{2}}$

  • B

    $\frac{ v - u }{2}$

  • C

    $\frac{ u + v }{2}$

  • D

    $\sqrt{\frac{ v ^{2}- u ^{2}}{2}}$

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