A ball is projected with a velocity, \( 10 \mathrm{~ms}^{-1} \), at an angle of \( 60^{\circ} \)...

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A ball is projected with a velocity, \( 10 \mathrm{~ms}^{-1} \), at an angle of \( 60^{\circ} \) with the vertical direction. Its speed at the highest point of its trajectory will be:
(1) \( 10 \mathrm{~ms}^{-1} \)
(2) Zero
(3) \( 5 \sqrt{3} \mathrm{~ms}^{-1} \)
(4) \( 5 \mathrm{~ms}^{-1} \)
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