The circle of forces, traction circle, friction circle, or friction ellipse is an illustration representing the dynamic interaction between a vehicle's tire and the road surface. The diagram below shows the tire from above, so that the road surface lies in the x y {\displaystyle xy} -plane.
The circle of forces, traction circle, friction circle, or friction ellipse is an illustration representing the dynamic interaction between a vehicle's tire and the road surface. The diagram below shows the tire from above, so that the road surface lies in the x y {\displaystyle xy} -plane.
Source: Wikipedia "Circle of forces" · CC BY-SA 4.0
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