How do I apply rolling friction to a ball?

[hyacint]

Hello,

I need to apply rolling friction to a ball, but I don't understand where to plug it in.

I know the rolling friction that I want to put in, but I can't just subtract the force of rolling friction on velocity, because the ball would never come to a stop, it would turn back again (and make the ball going back and forward when velocity is smaller than that force).

F = µmg right? (on a flat plane at least)

But isn't this force depending on the velocity of the ball too? Because this force can't be more than the velocity of the ball, if so the ball could never stop. I don't get it.

I'm using a physics engine that handles everything else, but I need to plug in this rolling friction because the engine doesn't have it built in.

 

[jack action]

https://www.physicsforums.com/showpost.php?p=3200151&postcount=3"

 

[sophiecentaur]

Velocity has a SIGN, remember.