Recent content by wrobel

Critical review of the article cited in the original post

Mechanics is an inherently nonlinear science with plenty of counterintuitive effects. I believe that trying to explain everything on hand-wavy level is not only counterproductive, but actually harmful. Two forces act on the rigid body: the string tension and gravity. They cause precession...

Looks like a 'big science' pulled out of thin air.

That's exactly what I mean. And I was reading a book by a philosopher of science, and he claimed that Einstein canceled Newton.

I doubt that this statement is applicable to the history of science.

A general note (just for historical fairness): the theory of relativity originated with Poincaré, not Einstein. And it was developed not only through Einstein's efforts—far from exclusively his.

I think OP suffers from a lack of intuitive clarity regarding relativity

The whole point is what is meant by the word 'understand'. For example, any qualified mathematician can understand the theory of relativity.

Multiply the last equation by ##e^{ix}## and substitute ##u=e^{ix}##

Consider a right cone with vertex ##O## and vertex angle ##2\alpha##. A coin of radius ##r## rolls around the cone without slipping being in contact with the cone along a generatrix, such that the center of the coin coincides with the vertex of the cone. Let a point ##M## lie on the coin's rim...

I fixed the issue. Your help was invaluable.

edited edited

Honestly, I'm a bit shocked by everything that's going on here. $$x(t)=-R\omega t\sin\varphi+R\cos \varphi$$ $$y(t)=-gt^2/2+R\omega t\cos\varphi+R\sin\varphi$$ $$x(T)=-x(0),\quad y(T)=y(0)$$ Two equations, two unknowns: ##\varphi,\omega##