If someone is in the towing and recovery whats we surface resistance of the vehicle to roll a car? The coefficient of rolling friction is Fr = P / L where L is the load and P is the frictional resistance.
It is obvious that a Hummer will be a charge higher than a Prius. The frictional resistance P is inversely proportional to radius (r) of the wheel: P = (k / r) once the tires a little Prius compared to a Hummer make a difference.
Finally, the value of k is highly dependent on the pressure tire (road bike compared believe mountain biking) and surface type (asphalt, concrete, gravel, snow, etc.) of the road.
All this being said, you're looking at a number that can vary from 0.02 to 0.4. You do not have one handy, but I recommend a manual for Marks Standard Mechanical Engineers, available at most libraries.
Posted on January 21, 2010.
