How Levers Help Us
1970
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.
Director:
N/A
Writers:
N/A
Production:
N/A
Country:
N/A
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.
N/A
N/A
N/A
N/A
