points 1 and 2 lie on a streamline, the fluid has constant density, the flow is steady, and there is no friction. Although these restrictions sound severe, the Bernoulli equation is very useful, ...

They have limits, and the capstan equation is fundamental to understanding your biggest challenge when it comes to their design: friction. Wouldn’t it be neat if we could control anything ...

What looks like convenience could quickly evolve into a dystopian financial landscape where choice is no longer part of the equation. Friction, then, acts as a barrier—not to efficiency but to ...