How to stop a NodePath animated by a physic force?

I’m trying LinearVectorForce to move a model using code on this page … _of_forces

lvf=LinearVectorForce(1,0,0)  # Push 1 newton in the positive-x direction 
forceNode.addForce(lvf)  # Determine coordinate space of this force node
actorNode.getPhysical(0).addLinearForce(lvf) # Add the force to the object

and that model continuously moves to the positive x direction.
Is this how physics force work?
How can I stop this?

Thank you!