Average velocity of a particle is projectile motion between its starting point and the highest point of its trajectory is : (projection speed = $u$, angle of projection from horizontal= $\theta$)

  • A

    $u\,\, cos\theta$

  • B

    $\frac{u}{2}\sqrt {1 + 3{{\cos }^2}\theta } $

  • C

    $\frac{u}{2}\sqrt {2 + {{\cos }^2}\theta }$

  • D

    $\frac{u}{2}\sqrt {1 + {{\cos }^2}\theta }$

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