Biomechanics problem Help appreciated

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SUMMARY

The discussion focuses on solving a biomechanics problem involving a unipennate muscle with a pennation angle of 150 degrees and an insertion angle of 300 degrees at a hinge joint. The muscle exerts a tension of 550 N when the joint angle is 840 degrees. Participants suggest drawing a force diagram and calculating the components of force, including rotary and stabilizing components, as well as determining the muscle torque about the joint using the insertion distance of 4 cm.

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  • Knowledge of force diagrams and vector components.
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Hey guys,

I'm having a lot of trouble trying to work out this problem and don't know exactly where to start. I was wondering if someone knows how to tackle this?

A unipennate muscle of pennation angle 150 inserts into the distal bone of a hinge joint at an angle of 300. If the tension in the muscle is 550 N when the joint angle is 840, determine the rotary and stabilising components of force acting on the distal bone. If the insertion distance of the muscle from the joint is 4cm determine the muscle torque about the joint.

Thanks.
 
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Welcome to PF!

Hi study! Welcome to PF! :smile:

First draw a force diagram, like the one http://qaboard.cramster.com/physics-topic-5-1064-cpi0.aspx" .

Then take components of force, and also take moments of force (torques) about some convenient point.

What do you get?
 
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