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2006 March 7th, 15:53
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Quark
 Join Date: 2006 Mar
Location: University of Tehran
Posts: 5
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Conservation of Momentum or Conservation of Energy?
Hi,
Suppose that there are two balls A and B in an elastic environment. The ball A is 2Kg and its velocity is 5m/s, and the ball B is 1Kg and its velocity is 0m/s. A collides with B and stops. According to "Conservation of Momentum" the velocity of B should be raised to 10m/s(2*5=1*10). If we compare the kinetic energy of A before the collision with the kinetic energy of B after the collision we undrestand that the kinetic energy of B after the collision is more than the A's before the collision(KE of A: 25J, KE of B: 50J). But according to "Conservation of Energy" the enrgy should be conserved. So why doesn's energy conserve in this problem? Regards Last edited by mehrdad_baghery; 2006 March 8th at 02:20. |
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