I'm trying to get a firm understanding of rolling resistance and friction force in FBDs.
Can we say that rolling resistance (rolling friction/rolling drag) acts in an upward direction with respect to a rolling wheel (due to the leading resultant force) causing a resistive moment/torque to oppose the wheel's direction of rotation, but, from the point of view of a FBD it acts as an opposing force to the tractive force or pushing force that is accelerating the wheel/vehicle in a particular direction?
For example, in the FBD for a car, the rolling resistance force acts in the opposite direction to the driving force/motion of the car. Or, is the friction force that acts in the opposite direction to the car's motion a combination of rolling resistance and static friction.
I realise static friction acts in the opposite direction to the torque force of the rear wheels, providing a tractive force/motion in that direction. But, once the car is moving (wheels are rolling) do all of the wheels experience static friction and rolling resistance in the opposite direction to the motion of the wheels/car?
Can you please tell me if I am understanding correctly, thank you.