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1)∆ U = xri = ( L − x ) ri1 21 1 L∆U( )( )i 1 i 2∆UI = i1 + i2= + =EIr x L −x rx L −xrIx ( L − x )∆ U =Ld∆U rI ( L −2x)L= > 0 si x

1)∆ U = xri = ( L − x ) ri1 21 1 L∆U( )( )i 1 i 2∆UI = i1 + i2= + =EIr x L −x rx L −xrIx ( L − x )∆ U =Ld∆U rI ( L −2x)L= > 0 si x