I can’t tell exactly what you’re trying to do but the way you’re going about adding force to the pawn seems wrong to me. If you don’t want to add torque you could add a force or an impulse?
If you’re trying to simulate anything physics like yeah torque just adds some spin but thanks to the law of conservation unless something is slowing it down it won’t stop rolling, do you want it to? You can add linear or rotational damping to create that.
I guess I “fear” the result you will end up with will not seem very natural. Does the ball even roll when you do it your way?