-In the human body when the triceps applies a force to the olecranon in extending the non-supported forearm at the elbow, it exemplifies:

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In the human body, the triceps applying force to the olecranon to extend the forearm at the elbow is an example of a first-class lever, where the fulcrum (elbow joint) is between the effort (triceps muscle) and the load (forearm).

-In the Human Body When the Triceps Applies a Force