Ah ha, the answer to the bonus question onQuiz #1

A 3D plot of the Tension-Length and Force-Velocity relations.

Fig. 1 Builds a three dimensional presentation of the two relations Tension-Length and Force-Velocity given in the muscle and motor control literature (Gordon et al, 1966; A. Huxley, 1957; Hill, 1938) with some corrections in the mathematical model.

Fig. 2 Tension-length relation. Fig. 3 Lines of countour of Length-velocity relation.

Fig. 4 Tension-Length-Velocity surface with grid lines.