1J20.31 - Hinged Stick Paradox
Place the hammer handle into the hook with the hammer head facing back towards the clamped end of the board.
- John Henry Pepper, Henry George Hine, The Boy's Playbook of Science, p. 43.
- Charles Vivian, "Balancing the Impossible", Science Experiments & Amusements For Children, p. 24.
- Martin Gardner, "93, A Peculiar Balance", Smart Science Tricks, p. 137.
- "Experiment with Two-Foot Rule and Hammer", The Boy Scientist, p. 224.
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