Mechanics of Human Movement: Torque and Statics

For statics, does the internal force equal the external force?

• yes

For a static analysis, what muscle actions are looked at?

• isometric actions

What occurs during isometric contraction?

• muscle is active, and its attachments do not move relative to each other

• holding a position or resisting an external force

During an isometric contraction, is there any change in movement or velocity?

• no change in velocity or movement 

For static equilibrium, what must the sum of the force and torque be?

• Sum of forces = 0N

• sum of torque = 0N

True or false, muscle always pull?

• true

Do muscles pull equally or unequally on both attachment sites?

• muscles pull equally on both attachment sites

What is the muscle force represented by? 

• force represented by line of pull 

If a person’s muscles cannot produce a torque that is greater than or equal to the external force, will they be able to complete the task?

• No