lever systems Flashcards
draw 1st class leve including load arm and effort arm
draw 2nd class lever incuding load arm and effort arm
draw 3rd class lever including load arm and effort arm
what is a practical example for first class lever system
tricep extension at the elbow
what is practical example for 2nd class level system
plantar flexion at ankle
what is a practical example for 3rd class lever system
bicep curl (flexion of elbow)
what is mechanical advantage of the 1st class lever system
effort arm is comparitively small so advantage is low a.k.a. mechanical disadvantage
what is the mechanical advantage of the 2nd class lever system
effort arm is larger than the load arm so high mechanical advantage
what is the mechanical advantage of the 3rd class lever system
load arm is bigger than effort arm so mechanical advantage is low
define mechanical advantage
the efficiency of a lever in moving a load
acronym to remember lever system
123
FLE
the letter is whichever factor is in the middle of the diagram.
