Creating an accurate friction model of roller coasters is not a simple task. Even when a model is proposed, it is very difficult to test since roller coaster testing facilities are not widely available. Only theoretical explanations are publicly available, and very few at that. Companies are generally unwilling to divulge their findings, as a friction model can make a substantial difference in the accuracy of the results of dynamic calculations. Obviously this can drastically affect the quality of their rides. Some effects which contribute to friction are explained here, and a simple model is created to explain some of these effects. All friction forces are directed opposite the velocity of the car. Only the magnitudes are expressed here.