1j20.31a.jpg
hinged board clamped to a table, hammer underneath board

 

Code Number: 1J20.31

Demo Title: Hinged Stick Paradox

Condition: Good

Principle: Center of Mass

Area of Study: Mechanics

Equipment: 

Hinged board and hammer

Procedure: 

Place the hammer handle into the hook with the hammer head facing back towards the clamped end of the board.

References:

  • 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.