How Levers Help Us

How Levers Help Us

How Levers Help Us


(6 din 35 utilizatori)

0h 11m 1970 HD

How Levers Help Us en PortalulTauTV. 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 (1970)
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