The velocity at the maximum height of a projectile is half of its initial velocity \( u \). Its ...

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The velocity at the maximum height of a projectile is half of its initial velocity \( u \). Its range on the horizontal plane is
(1) \( \frac{2 \mathrm{u}^{2}}{3 \mathrm{~g}} \)
(2) \( \frac{\sqrt{3} u^{2}}{2 g} \)
(3) \( \frac{u^{2}}{3 g} \)
(4) \( \frac{u^{2}}{2 g} \)
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