Question

A projectile is launched with 30m/s at an angle of 60°with the horizontal.(a) find the position of the projectile, and the magnitude and direction of its velocity at t=2s (b) find the time when the ball reaches the highest point.(c) find the horizontal range

Answer 1

$l=\frac{v^2\sin2\alpha}g=79.5~m,$

$h=\frac{v^2\sin^2\alpha}{2g}=34.4~m,$

$t=\frac{2v\sin\alpha}g=5.3~s.$