Question
Which of the following requires the action of a first class lever in the body?
A.
jumping
B.
push-ups
C.
waving
D.
nodding
A.
jumping
B.
push-ups
C.
waving
D.
nodding
Answers
GPT-4o mini
The action that requires the action of a first class lever in the body is D. nodding.
In the case of nodding the head, the fulcrum is the atlanto-occipital joint (where the skull meets the spine), the effort is applied by the muscles on the back of the neck, and the load is the weight of the head. This arrangement fits the first class lever system, where the fulcrum is located between the effort and the load.
In the case of nodding the head, the fulcrum is the atlanto-occipital joint (where the skull meets the spine), the effort is applied by the muscles on the back of the neck, and the load is the weight of the head. This arrangement fits the first class lever system, where the fulcrum is located between the effort and the load.