How long does it take for the projectile to reach its target?

Question

answer in units of s. (Assume no friction). (This is part three of the cannon question).

Answer 1

total time of the projectile is t

 

t = 2v_y/g

v_y = 55.7 m/s

 

t= 2(55.7) / 9.8 = 11.4 s