How Levers Help Us
5.5
Documentary
Rated:
1970
0h11m
On:
Country: United States of America
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. 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. 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. 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.
AD
