How Levers Help Us (1970)
Shows the three parts of a lever and demonstrates how various levers help to move things more easily, or move them farther and faster.
We digitized and uploaded this film from the A/V Geeks 16mm Archive. Email us at footage@avgeeks.com if you have questions about the footage and are interested in using it in your project.
(Visited 24 times, 1 visits today)
About The Author
