How to stop a physics object slowly

I have a car game in which the car uses the rigidbody.addforce to move the car and I have a braking system where you have the letter X as the brake key. I use the rigidbody.velocity(0, 0, 0) and the rigidbody.angularvelocity(0, 0, 0) to stop the car but when I push x it instantly stops the car instead of slowing the car down until it's static. it doesn't give a proper car vibe