math component

My group chose an angle of 35 to 40 degrees for our cannon. We chose this because we wanted our Nerf ball to go farther instead of higher so we used an angle that wasn’t too high but slightly below 45 degrees. I have seen that some artillery is used with an angle like this depending on the distance that they were shooting.

Velocity:
R/i= (Vo2 sin2 O)/g; Rg/Vo2= SIN 2 O; Vo2=(Sin 2 O)/Rg ; Vo2=(Sin 2 (35))/R(32.2); Vo2= (sin 2(35))/0; Vo2=0