How to make a constant speed or how to stop CollisionShape2D spinning after collision?

Question

CollisionShape2D is spinning after collision and slows down.
All objects have rectangle collision shape.

Answer 1

What type of PhysicsBody is this? Rigid or Kinematic? I assume it's a rigid one.
For the breakout game, I would actually rather use a kinematic body, because they are more easy to control, not to say that a rigid body has no advantages here.

You can then calculate the angle and set the new direction of the kinematic body randomly in some range.

Answer 2

Right after the collision, zero the rotation rate of the object.