a horizontal tunnel has a height of 3m. A ball is thrown inside the tunnel with an initial pseed of 18ms^-1. what is the greatest horizontal distance that the ball can travel before it bounces for the first time?
u_x=18
u_y=0
s_x=18t
s_y=-4.9t^2
thats is where i am stuck on.... I don't know what to do after this.
thanks