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    Rock Mechanics: Mohrs Stress Circle - Principal Stresses

    Homework Statement A series of shear tests were performed on a weak rock. Each test was carried out until the sample sheared, and the principal stresses for each test were: S. No.--- σ3 (KN/m2) --- σ1 (KN/m2) 1 --- 200 --- 570 2 --- 300...