levers Flashcards
What represents the fulcrum
Triangle
What represents the effort?
arrow
What represents the load/resistance
Square
What is the fulcrum?
joint
what is the effort?
the muscle
What is the load?
Body part needing to be lifted / moved
123 think ….?
FLE
Where is a first class lever found?
neck extension
fulcrum = neck joint
effort = trapezius muscle
load = weight of the head
Where is a second class lever found?
plantar flexion
effort = gastrocnemius
fulcrum = phalanges
load = body weight
Where is a third class lever found ?
bicep curl
fulcrum = elbow joint
effort = bicep
load = dumbell
What is mechanical advantage?
When the effort arm is longer than the load arm
Why is mechanical advantage good?
because it allows performers to lift heavier things without applying much force
What is mechanical disadvantage?
When the load arm is longer than the effor arm
where is mechanical advantage most likely to be found
2nd class levers
Where can you find mechanical disadvantage?
third class levers
This requires more effort from the body in order to life heavier things.
