Levers MOVEMENT ANALYSIS Flashcards
How many levers are there?
3
What is a lever?
A rigid bar that turns about an axis to create movement
What is the effort?
The force required to move the load.
What is the fulcrum?
The fixed point at which a lever turns or is supported. It can be referee to as the axis.
What is the load/resistance/weight?
The load or weight to be moved by the lever system.
How can you remember the levers?
EFL the ELF FEL
Effel the elf fell
Talk about a first class lever.
Effort Fulcrum Load
Elbow extension
Elbow extension phase of a javelin throw.
Talk about a second class lever.
Effort Load Fulcrum
Ankle extension
This is the most effective lever as a relatively small force can move a large weight.
Talk about a third class lever?
Fulcrum Effort Load
Everything except elbow and ankle extension
Most common lever.
They can produce a larger range of movement with relatively low effort.
Sporting examples of a first class lever?
Elbow extension phase of a javelin throw.
Dumbbell triceps extensions.
Sporting examples of a second class lever?
Standing calf raises
Pushing against blocks on a sprint start.
About to jump on a long jump.
Sporting examples of a third class lever?
Upward phase of a bicep curl.
Seated leg extensions.
Seated hamstring curls.
What is mechanical advantage?
The lever can overcome a large load with relatively little effort.
How do you work out mechanical advantage?
Effort arm / resistance arm
What is the effort arm?
The length between the effort and the fulcrum.
