Answer:

Step-by-step explanation:
given,
initial velocity of the first cannon = 22.0 m/s
after 1.5 s second cannon launches at speed = 22 m/s
height where they collide = ?
using equation of motion



for collision s₁ = s₂



0 = -1.5 u + 1.5 gt -1.125 g

t = 2.99 s = 3 s


