Question

elbow extension is an example of which class lever?
a) 1st
b) 2nd
c) 3rd
d) 4th

Explanation:

• First - class lever: The fulcrum is between the effort and the load.
• Second - class lever: The load is between the fulcrum and the effort.
• Third - class lever: The effort is between the fulcrum and the load. In elbow extension, the muscle (effort) is applied between the joint (fulcrum) and the hand (load).
• There is no fourth - class lever in the standard lever classification.

Answer:

c) 3rd