A particle is moving on a circular path of radius $r$ with uniform velocity $v$. The change in velocity when the particle moves from $P$ to $Q$ is $(\angle POQ = {40^o})$

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  • A

    $2v\cos {40^o}$

  • B

    $2v\sin {40^o}$

  • C

    $2v\sin {20^o}$

  • D

    $2v\,\cos {20^o}$

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