This is a home work problem shown in many Fundamental Physics textbooks . * How to stack four uniform blocks on top of a table, so that they extend as far right as possible and still remain stable. * How should each be positioned? * Can the top block have its entire length beyond the edge of the table.

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Blocks and center of gravity
Designed by Fu-Kwun Hwang (http://www.phy.ntnu.edu.tw/ntnujava/)
Deptartment of Physics, National Taiwan Normal University, Taiwan