How Levers Help Us (1970)
197011 minDocumentary
Overview
This instructional film shows the three parts of a lever and demonstrates how various levers help to move things more easily, or move them farther and faster.
What is How Levers Help Us about?
This instructional film shows the three parts of a lever and demonstrates how various levers help to move things more easily, or move them farther and faster. How Levers Help Us is a Documentary movie, released on 1970-01-01, runtime 11 minutes.
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Sources
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