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Para determinar a fracção de energia perdida, calculam-se asenergias cinéticas inicial e final:Energia inicial:Energia final:T1 2 11 2 p 1 2( )( )= m v = 10 3 = 45 J2( )2( )( )T = m + m v = 10 + 25 0.742 = 9.63 J1 12 2 p c 2 22T− TT1 2145 − 9.63= = 0.7864537

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