Specifications

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The muscle activity is rather constant which is the natural consequence of the moment arms being rather
constant. The gravity as well as the applied load of 100 N are vertical, so one might be tempted to think that
a horizontal support would not make much of a difference. We can do a quick test by simply switching on
the horizontal support of the driver:
Reaction.Type = {1, 0};
This produces immediate proof that mechanics is usually more complicated than expected; even this very
simple mechanical system behaves differently from what we might expect:
Notice that the muscle activity is much smaller in the beginning of the movement with the reaction switched
on and much the same towards the end of the movement. It seems like the muscles are able to use the
horizontal reaction force to their advantage depending on the posture of the mechanism.
Walls in general do not work like that; they can only provide reaction pressure but no tension. This we can
mimic with general a muscle. We first switch the reaction off again:
Reaction.Type = {0, 0};
Subsequently we define a general muscle:
AnyMuscleModel MusModel = {