Fulcrum

The video tutorial explains the concept of fulcrums, which are pivotal points in levers and wheels. It provides examples of fulcrums in everyday objects like scissors, bottle openers, seesaws, and oars. The tutorial also discusses how wheels function as rotating levers with fulcrums at their centers. The video concludes with a reflective question about identifying the fulcrum in a human arm when lifting a barbell.

What new insight or understanding did you gain from this video?