Question

Two projectiles are thrown with the same initial velocity, one at an angle and the other at

an angle of . (a) Can both projectiles strike the ground at the same distance from the

projection point? (b) Can both projectiles be in air for the same time interval?

Answer 1

a)

YES

$\sin2\alpha=\sin2(90°-\alpha),$

b)

NO

$\sin\alpha \not =\sin(90°-\alpha),$

YES, when $\alpha=45°.$