Lever Systems Flashcards
How do you establish a lever system?
F = 1 L = 2 E = 3
What muscle group is within the 1st class lever system?
Triceps brachii
What muscle group is within the 2nd class lever system?
Tibialis anterior
Gastrocnemius
What muscles are within the 3rd class lever system?
All the muscles besides:
Tricep brachii
Gastrocnemius
Tibialis anterior
What are second class every systems used for?
Heavy loads
What are third class lever systems used for?
Move quickly
How do you establish the effort/force arm?
The distance between the fulcrum and effort
How do you establish the load/resistance arm?
The distance between the fulcrum and the load
What is an example of the fulcrum?
The joint
What is an example of the load?
The part of the body being lifted
What is an example for the effort?
The insertion of the agonist muscle
What is the relationship between the effort/force arm and the load/resistance arm in the first class lever system?
The arms are equal
What is the relationship between the effort/force arm and the load/resistance arm in the second class lever system?
The effort/force arm is the longest
Is the second class lever system at a mechanical advantage or disadvantage?
The 2nd class lever system is at a mechanical advantage because the fort arm is longer than the load arm -we can lift heavy loads e.g our body
What is the relationship between the effort/force arm and the load/resistance arm in the third class lever system?
The effort arm is shorter than the load arm
