Question: The surface traction at a point is (mathbf{T}^{(mathbf{n})}={3,4,5}^{mathrm{T}}) on a plane whose normal vector is parallel to the zaxis. Calculate the normal and shear stresses

The surface traction at a point is $\mathbf{T}^{(\mathbf{n})}=\{3,4,5\}^{\mathrm{T}}$ on a plane whose normal vector is parallel to the zaxis. Calculate the normal and shear stresses on this plane. What is the angle between $\mathbf{T}^{\mathbf{( n )}}$ and $\mathbf{n}$ ?

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