User talk:Taupusensteinas

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October 2009
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In answer to your question
Supose there is 1 kg iron ball which flying at velocity 100 m/s. This 1 kg ball stroke into 2 kg don't moving iron ball in cosmos. 1 kg ball get 50 m/s velocity in oposit direction (reflect from bigger one). 2 kg ball got velocity 25 m/s. So conservation of momentum is seems correct, because 100*1=50*1+25*2. But here is a trick, conservation of kinetic energy then becoming imposible. Because mvv/2=1*100*100/2=5000 J. And 1*50*50/2+2*25*25/2=1875 J. So kinetic energy of single fast 1 kg ball was bigger than of two flying balls together. So there apears no then conservation of kinetic energy, so what is more important conservation of momentum, or conservation of kinetic energy? Or this bounce of balls should be resolved in over way? If yes, very please, show me how!


 * First, you don't say what coefficient of restitution you are using to calculate veloceties after the collision. It appears that you are using 0.75.


 * Second, you cannot use conservation of energy for the analysis of impact problems, so the entire second calculation is meaningless.


 * Good luck. -AndrewDressel (talk) 14:57, 15 October 2009 (UTC)

Your recent edits
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