Adding a force impulse via powerbar (slider)

Hi there,

i want to dive deeper into unity. my knowledge in scripting and UI-Stuff is very low, so i am asking the wonderfull unity-community. My problem contains, as mentioned above, UI-Stuff and scripting. Let me explain my Issue.

I have balls in my scene and those balls should be thrown by the player (3 balls for each player) via 2 sliderbars. 1 for the direction left and right and one for the power (how far the balls should be thrown). my beginnings in testing how to add a force impulse to the ball werent a completely desaster but over all it didnt work that good

and combining those tests with a unity sliderbar is completely overcharging me
can some1 help me with advises or code ? this would be great.

greets