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A particle is projected at an angle \( \theta=30^{\circ} \) with the horizontal, with a velocity of \( 10 \mathrm{~m} \mathrm{~s}^{-1} \). Then
(1) After \( 2 \mathrm{~s} \), the velocity of particle makes an angle of \( 60^{\circ} \) with initial velocity vector.
(2) After \( 1 \mathrm{~s} \), the velocity of particle makes an angle of \( 60^{\circ} \) with initial velocity vector.
(3) The magnitude of velocity of particle after \( 1 \mathrm{~s} \) is \( 10 \mathrm{~m} \mathrm{~s}^{-1} \).
(4) The magnitude of velocity of particle after \( 1 \mathrm{~s} \) is \( 5 \mathrm{~m} \mathrm{~s}^{-1} \).
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