Ch. 8 Key Equations - University Physics Volume 1 _ OpenStax.pdf

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Unformatted text preview: 2020/12/7 Ch. 8 Key Equations - University Physics Volume 1 | OpenStax Key Equations Difference of potential energy ΔUAB = UB − UA = −WAB Potential energy with respect to zero of potential energy at r0⃗ ⃗ − U (r0 ⃗ ) ΔU = U (r) Gravitational potential energy near Earth’s surface U (y) = mgy + const. Potential energy for an ideal spring U (x) = Work done by conservative force over a closed path Wclosed Condition for conservative force in two dimensions ( Conservative force is the negative derivative of potential energy Fl = − Conservation of energy with no non-conservative forces 0 = Wnc,AB = Δ(K + U ) dF x dy 1 2 kx path ) = ( 2 + const. = ∫ dF y dx ⃗ Fcons ⋅ dr ⃗ = 0 ) dU dl AB = ΔEAB . 1/1 ...
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