Saturday, July 2, 2016

special relativity - How to derive addition of velocities without the Lorentz transformation?


Lorentz contraction and time dilatation can be deduced without Lorentz transformation. Can you deduce also the theorem of addition of velocities


$$w~=~\dfrac{u+v}{1+uv/c^2}$$


without Lorentz transformation? Using just the constancy of light speed.




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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