A projectile is thrown with a speed \( v \) at an angle \( \theta \...

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A projectile is thrown with a speed \( v \) at an angle \( \theta \) with the upward vertical. Its average velocity between the instants at which it crosses half the maximum height is
(A) \( v \sin \theta \), horizontal and in the plane of projection
\( \mathrm{P} \)
(B) \( v \cos \theta \), horizontal and in the plane of projection
(C) \( 2 v \sin \theta \), horizontal and perpendicular to the plane of projection
W
(D) \( 2 v \cos \theta \), vertical and in the plane of projection.
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