Suction Cup
Purpose
A suction cup lifts a heavy lab jack, demonstrating that atmospheric pressure -- not "suction" -- provides the holding force (\(F = \Delta P \cdot A\)). A clever release mechanism breaks the seal instantly to drop the jack.
Figure 1:
Suction cup with bamboo skewer inserted through the handle, resting on the lab jack before attachment.
Figure 2:
The lab jack hangs suspended from the suction cup. Atmospheric pressure holds the cup to the jack's smooth surface.
Equipment
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