MT-1620 al.2002 We look at equilibrium in the z direction Take the z-components of N e. g + dw z-component=-Nsin hy note +z direction for small angle dw dw sin dy dy dw →z- component=-N dy(acts over dx face Paul A Lagace @2001 Unit 11-p 5MIT - 16.20 Fall, 2002 We look at equilibrium in the z direction. Take the z-components of N: e. g. w z-component = −N sin ∂∂y note +z direction for small angle: sin ∂w ≈ ∂w ∂y ∂y ∂w ⇒ z-component = −N ∂y (acts over dx face) Paul A. Lagace © 2001 Unit 11 - p. 5