Lever Systems
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9 Terms
What is in the middle of a first class lever?
Fulcrum
What is in the middle of a second class lever?
Load
What is in the middle of a third class lever?
Effort
What is an example of a first class lever?
Neck when raising head
What is an example of a second class lever?
Ankle plantarflexion
What is an example of a third class lever?
Bicep Curl
Explain each component of a first class lever system during neck raising.
The fulcrum is the neck
The load is the weight of the head
The effort is the neck muscles
Explain each component of a second class lever system during ankle plantarflexion.
The fulcrum is the ankle joint
The load is the weight of the person
The effort is the gastrocnemius
Explain each component of a third class lever system during a bicep curl.
The fulcrum is the elbow joint
The load is the weight of the forearm and piece of equipment
The effort is the bicep