wrobel's latest activity
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wrobel replied to the thread High School Why the bottom of a rolling wheel has zero velocity. -
wrobel replied to the thread High School Deriving the "third" kinematic equation using graphs.Looks like a 'big science' pulled out of thin air. -
wrobel reacted to weirdoguy's post in the thread High School Can anyone deeply understand relativity? with
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Well, I read one book on history of QM (Duncan, part 1) and I don't know how non physicist could understand any of it. -
wrobel replied to the thread High School Can anyone deeply understand relativity?.That's exactly what I mean. And I was reading a book by a philosopher of science, and he claimed that Einstein canceled Newton. -
wrobel replied to the thread High School Can anyone deeply understand relativity?.I doubt that this statement is applicable to the history of science. -
wrobel replied to the thread High School Can anyone deeply understand relativity?.A general note (just for historical fairness): the theory of relativity originated with Poincaré, not Einstein. And it was developed not... -
wrobel replied to the thread High School Can anyone deeply understand relativity?.I think OP suffers from a lack of intuitive clarity regarding relativity -
wrobel replied to the thread High School Can anyone deeply understand relativity?.The whole point is what is meant by the word 'understand'. For example, any qualified mathematician can understand the theory of relativity. -
wrobel replied to the thread Solving an elementary trigonometric equation.Multiply the last equation by ##e^{ix}## and substitute ##u=e^{ix}## -
wrobel replied to the thread Solving an elementary trigonometric equation. -
wrobel replied to the thread problem with account.I fixed the issue. Your help was invaluable. -
wrobel replied to the thread High School Just a cool high school problem.edited edited -
wrobel replied to the thread High School Just a cool high school problem.Honestly, I'm a bit shocked by everything that's going on here. $$x(t)=-R\omega t\sin\varphi+R\cos \varphi$$ $$y(t)=-gt^2/2+R\omega... -
wrobel replied to the thread High School Just a cool high school problem.There is a unique answer for the purely vertical motion: ##\omega=\frac{gT}{2R}## $$-\frac{gT^2}{2}+\omega R T=0$$ Just read the text...

