I would like to thank every one for your answers to my questions. Please forgive my ignorance but I am still confused about rolling resistance. Does a car rolling down the road on say the moon where there is no air take the same amount of force to move at 10 mph as 50mph? Does force to over come rolling resistance equal power required to move an object at a given speed in this example? Is the power requierment the same at 10 mph and 50 mph? I may be over thinking this, it seems too simple like somthing for nothing.
