67. Work and Energy - Δ K K f-K i Δ U U f-U i •...

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Work and Energy Consider a block of mass m moving along the x -axis. Conservative force acting on block: F = F ( x ) Work done by F ( x ) on block: W if = Z x f x i F ( x ) dx Kinetic energy of block: K = 1 2 mv 2 Potential energy of block: U ( x ) = - Z x x 0 F ( x ) dx F ( x ) = - dU dx Transformation of energy:
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Unformatted text preview: Δ K ≡ K f-K i , Δ U ≡ U f-U i • Total mechanical energy: E = K + U = const ⇒ Δ K + Δ U = 0 • Work-energy relation: W if = Δ K =-Δ U F(x ) F(x ) x i x f m m v i v f i f x tsl67 – p.1/1...
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