A bullet is fired with a velocity umaking an angle of \( 60^{\circ} \) with the horizontal plane...

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A bullet is fired with a velocity umaking an angle of \( 60^{\circ} \) with the horizontal plane. The horizontal component of the velocity of the bullet when it reaches the maximum height is
[WB-JEE 2009]
(a) \( u \)
(b) 0
(c) \( \frac{\sqrt{3 u}}{2} \)
(d) \( u / 2 \)
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