Inclined plane with height $$h$$ (cathetus), bottom length $$b$$ (cathetus) and length $$l$$ (hypotenuse). Gravitational force $$F_{\text g}$$ (weight) acts on a body on the inclined plane in the direction towards the ground. The gravitational force can be split into the force $$F_{\text H}$$ alon the plane and the normal force $$F_{\text N}$$.