At a point in a strained material, on plane BC there are normal and shear stresses of 560N/mm2 and 140 N/mm2 respectively

At a point in a strained material, on plane BC there are normal and shear stresses of 560N/mm² and 140 N/mm² respectively. On plane AC, perpendicular to plane BC, there are normal and shear stresses of 280N/mm² and 140N/mm² respectively as shown in the figure below. Determine the following

a.      Principal stresses and location of the Planes on which they act

b.      Maximum Shear Stress and the Plane on which it acts.

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