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A particle is thrown at time \( \mathrm{t}=0 \) with a velocity of \( 10 \mathrm{~m} / \mathrm{s} \) at an angle of \( 60^{\circ} \) with the horizontal
\( \mathrm{P} \) from a point on an incline plane, making an angle W of \( 30^{\circ} \) with the horizontal. The time when the velocity of the projectile becomes parallel to the incline is
(1) \( \frac{2}{\sqrt{3}} \sec \)
(2) \( \frac{1}{\sqrt{3}} \sec \)
(3) \( \sqrt{3} \mathrm{sec} \)
(4) \( \frac{1}{2 \sqrt{3}} \sec \)
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