Chenguang Zhang

The leaning tower of Lire with variable block mass

Editor's Note: A classic block-stacking puzzle becomes more interesting when the blocks have different masses. Readers discover how changing thickness or density can make the total overhang shrink, grow slowly, or even increase linearly. The “Lire Tower Transform,” a neat way to...

A physical model of the sinc function: The center-of-mass spiral

The sinc function, defined as sinc(x)=sin(x)/x, is a fundamental tool in applied mathematics and physics, arising in fields ranging from signal processing to quantum mechanics. This paper presents a novel physical interpretation of the sinc function in the context of classical me...