# Why does the friction force on the front wheel of a car point backwards (when considering a rear wheel drive car)?

I fully understand why the friction force points forwards on the back wheel. In my head, if i were to think about a rouge, unpowered, solo wheel, rolling along the ground for example, the friction force on the wheel is still pointing backwards. Furthermore, in my mind, I dont see a difference between this rouge unpowered wheel and the front two wheels of the car.

Simply stated: If both the front and back wheels of a car are spinning in the same direction, shouldn't the friction forces be pointing in the same direction? How would the ground even know whether the wheels are powered or not?

• Okay do you think when the friction on the front wheel will be in the same direction as the back wheel then the car will be able to move? Simply $NO$, if the friction on the front wheel will act in the same direction as the back wheel then it will produce the torque opposite to the direction as torque provided by the engine and the car won't move at all it's very simple to understand with this example just draw a diagram and try to resolve the direction of torque when friction is in the same.... Jan 21, 2022 at 7:50
• .....direction as that of back wheel and for the case in which the friction is in the opposite direction you will automatically get your answer! Jan 21, 2022 at 7:50
• Just to be clear, when you ask in which direction the force "points," are you asking about the force that the road exerts on the passive wheel? or are you asking about the equal and opposite force that the wheel exerts on the road? May 17 at 18:17