Project: Ball Launcher - Calculate Torque and RPM

[Pencil123]

Hi! I am making a physics project and I need to throw a ball to a target which is 5 meters ahead. I will use 2 counter rotating wheels to throw the ball but I have no idea what should motors torque or rpm should be. I tried to calculate it with determining the velocity first but the ball needs to bounce in 6 meters after they get through the target. About 30m/s I calculated a torque like 40nm using 1/2mv²=2τΔθ . But I'm not sure if 30m/s is enough or too much. I need a velocity which is not too much so it can get to the ground in 11m but also not too little so I can take aim easily without aiming too above. I would be happy if you could help me about it. Also I would be happy if you help me about the rpm of the motors.
Edit: Balls mass is 270 grams.

 

[Simon Bridge]

Welcome to pf,
Why not get some motors that are handy and try it?

(To get the bounce right, you will need some trial and error anyway.)