B Applied Mechanics -- Billiard Balls

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Efren "Bata" Reyes demonstrates his superhuman precision in managing elastic collisions. It may look like luck but he does this sort of thing consistently. I've seen one that's even more amazing but have lost track of it.

 
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Here's another good one.



The clip I can't find is similar but the ball he uses for deflection is also moving.
 

Thread 'Is calling fictitious forces "not real" just about terminology?'

Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...
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