Neglecting the air resistance, the time of flight of a projectile is determined by

  • A

    ${U_{vertical}}$

  • B

    ${U_{horizontal}}$

  • C

    $U = {U^2}_{vertical} + {U^2}_{horizontal}$

  • D

    $U = U\,{({U^2}_{vertical} + {U^2}_{horizontal})^{1/2}}$

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  • [AIIMS 1998]

In projectile motion, the modulus of rate of change of velocity