car wheels brakes 2d

Hello, i make 2d car game. I want stop my car almost any angle. For wheels i use Hinge Joint, Capsule collider and rigidbody, The car movment is realized through AddRelativeTorque. But i don't know, how to implement the brakes. The only thing that came to mind is to make the mass and drag equal to 15. (Car mass is 20). In this case, the machine slows perfectly. But I think that's wrong, is it ?

Sorry for my bad English