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v 2v1Savršeno elastičan centralni sudar‣Centralni sudar – čestice (tijela) prije i poslije sudara se gibaju dužspojnice njihovi središtaPrije sudarav 1 v 2Poslije sudarau 1 u 2m 1m 2zakon očuvanja količine gibanja m vm 1 m 21 1 m2v2 m1u1 m2u2zakon očuvanja energije12mv12121222221 mv2 mu1 mu2Rješavanjem sustava jednadžbi dobijemou1( m1 m2)v1 2m2v2m m12u2( m2 mm11 )v2 2m1v m214 - Rad i Energija

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