Problem

Average velocity of a particle in projectile motion between its starting point and the highest point of its trajectory is (projection speed =

u

, angle of projection from horizontal =

\theta

) a.

u \cos \theta

\frac{u}{2} \sqrt{1 + 3 \cos^2 \theta}

\frac{u}{2} \sqrt{2 + \cos^2 \theta}

\frac{u}{2} \sqrt{1 + \cos^2 \theta}