Taupusensteinas

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October 2009

Welcome and thank you for experimenting with Wikipedia. Your test on the page Talk:Kinetic energy worked, and it has been reverted or removed. Please take a look at the welcome page to learn more about contributing to this encyclopedia. If you would like to experiment further, please use the sandbox instead. Thank you. - DVdm (talk) 15:40, 2 October 2009 (UTC)

Welcome to Wikipedia! I am glad to see you are interested in discussing a topic. However, as a general rule, talk pages such as Talk:Momentum are for discussion related to improving the article, not general discussion about the topic. If you have specific questions about certain topics, consider visiting our reference desk and asking them there instead of on article talk pages. Thank you. - DVdm (talk) 14:40, 15 October 2009 (UTC)

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)

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