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"Nearly every introductory physics textbook has an illustration showing a car being pulled out of mud. One end of the rope is attached to the car's bumper while the other is attached to a tree, on the other side of the road. A man, standing in the middle of the road, pulls the rope upwards, with a force F1. The force exerted by the rope on the car, F2, turns out to be several times larger, than F1, depending on the angle between the road and the rope. ... We all know how to explain this mathematically, deriving the
F2/F1=1/[2*sin(alpha)]