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?
What type of lever does this relate to ?
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?
What class of lever does this relate to
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
