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Hammer Ruler Trick
Ever seen something that looked impossible? In this science fair project, we’re going to investigate the physics of torque, balance, and the centre of gravity using a “discrepant event”—something that appears to defy the same laws of physics that make it work in the first place. Grab a ruler, a hammer, some tape, and a piece of string, and get ready to make something very cool.
How can you balance a ruler on the very edge of a table so that only a quarter of an inch of the ruler is touching the table?
Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.