Movement Analysis Flashcards
The three parts of a lever system are the …
Fulcrum
Load
Effort
The three parts of a lever system in the human body are..
Joint
Weight/ body weight
Muscle contacting
How’s the fulcrum presented On a diagram
A triangle
How’s the load / resistance presented on a diagram
A box
How’s the effort presented on a diagram?
An arrow
How many different class of lever are there?
3
First class lever
Second class lever
Third class lever
How to remmeber where the middle part is on a lever?
Use FLE
The letter is the thing in the middle of the lever
E.g for. A first class lever the fulcrum would be in the middle
What does mechanical advantage measure ?
Efficiency of a lever ( how easy it is to lift the load)
What does mechanical advantage depend on?
Distance between effort and fulcrum ( effort arm)
Distance between the load and fulcrum ( resistance arm)
What’s the resistance arm?
Distance between load and fukcrum
What’s the effort arm?
Distance between effort and fulcrum
How is mechanical advantage calculated ?
Effort arm divided by resistance arm
What’s rule 1 of mechanical advantage?
When Effort arm is shorter than load arm it has low mechanical advantage
Third class levers always have low mechanical advantage
What’s rule 2 of mechanical advantage?
When the effort arm is larger than the load arm it has high mechanical advantage
Second class levers
Heavy loads little effort
What is a plane?
Shows direction of movement
