# Biomechanics problem Help appreciated

• study
In summary, the conversation discusses a problem involving a unipennate muscle with a pennation angle of 150 and a hinge joint with an insertion angle of 300. The question is to determine the rotary and stabilising components of force and the muscle torque about the joint. The suggestion is to draw a force diagram and take components and moments of force to solve the problem.

#### study

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.

Welcome to PF!

Hi study! Welcome to PF!

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

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

What do you get?

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## 1. What is biomechanics?

Biomechanics is the study of the mechanical principles of living organisms, particularly humans, and how they interact with their environment.

## 2. What is a biomechanics problem?

A biomechanics problem is a specific issue or challenge related to the application of mechanical principles to living organisms, often involving analysis or optimization of movement, forces, or structures.

## 3. How can biomechanics be applied in real life?

Biomechanics has a wide range of applications in many fields, including sports, medicine, rehabilitation, and engineering. It can be used to improve athletic performance, design prosthetics, understand and prevent injuries, and develop more efficient movement techniques.

## 4. What are some common techniques used in biomechanics research?

Some common techniques used in biomechanics research include motion capture, force plates, electromyography, and computer simulations. These tools allow researchers to measure and analyze movement, forces, and muscle activity in a variety of settings.