Lever Systems

Question 1

Components of a Lever

Answer 1

-A joint (Fulcrum)
-A weight/resistance placed on the joint (Load)
-Muscle that creates force + movement (Effort)

Question 2

1st Class Lever (EFL)

Answer 2

-Fulcrum between effort and load
-Can provide mechanical advantage, depends on if fulcrum is closer to load or effort
-Example: Header in Football

Question 3

2nd Class Lever (ELF)

Answer 3

-Load between effort and fulcrum
-Always provides mechanical advantage (effort arm longer than weight arm)
-Example: Take-off in a Lay-up

Question 4

3rd Class Lever (FEL)

Answer 4

-Effort is between fulcrum and load
-Never provides mechanical advantage
Example: Bicep Curl

Question 5

Mechanical Advantage

Answer 5

-Lever can move a larger load with smaller effort

Mechanical Advantage= Load divided by Effort