Lever Classification (Pages 445-451)
1st class: The
fulcrum is between the effort (force) and the resistance.
Example: The triceps working at the elbow.
2nd Class: The
resistance is between the fulcrum and the effort.
Example: The gastrocnemius working to raise
the heel off the ground.
3rd Class: The effort
is between the resistance and the fulcrum.
Test your knowledge
(For each question select one response and then click
on the submit button. )
1. The following
diagram shows an example of a _____ class lever.
Use the diagram below
to answer questions 2-5.
(Click on the Submit button after
entering each response.)
2. In the example
above, if the arm remains rigid, which structure is the fulcrum?
4. Which of the following
provides the majority of the resistance?
5. What type of lever
is this an example of?
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