A Challenge in Careful Logical Thought!
With just four identical wooden blocks, how can you position them so that the uppermost rests entirely beyond the edge of a table without falling? By carefully considering centers of mass and moments you can show that each must be offset by L/2n from the next to achieve this surprising result. Blocks are marked on one side for easy demonstration, and are blank on the other side for student challenges. Includes four blocks and instructions.