m₁ PII m₂ diam Hukum kekekalan momentum: P₁+P₂1=PIF+P2F PIF P2F I-initial, awal F-final, akhir PIPIFCOS0, + P2PCOS0₂ [0= P₁psin 0, -P2psin 0₂ P+Pir-2PPIE COSO, = P²F
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