Tractrix is the curve along which an object moves, under the influence of friction, when pulled on a horizontal plane by a line segment attached to a tractor (pulling) point that moves at a right angle to the initial line between the object and the puller at an infinitesimal speed. It is therefore a curve of pursuit. The tractrix has the property that the segment of its tangent, between the asymptote and the point of tangency, has constant length a.

Related formulas


yy axis (dimensionless)
alength of the pulling thread (dimensionless)
xx axis (dimensionless)