Fastening Mechanism Using a Rocker

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A board is slid on the table under a rocker mounted on a table. The end of the board lifts the inside arm of the rocker, forcing the other end down to clamp the board. This is a way of fastening a board on a table.
Contributed by: Sándor Kabai (September 2008)
Open content licensed under CC BY-NC-SA
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In physics, such a rocker is considered a first-class lever. For further information see the Wikipedia entry.
Permanent Citation
"Fastening Mechanism Using a Rocker"
http://demonstrations.wolfram.com/FasteningMechanismUsingARocker/
Wolfram Demonstrations Project
Published: September 10 2008