अभिलंब प्रतिबलों (normal stresses) को दर्शाने वाले 3D प्रतिबल टेंसर आव्यूह (stress tensor matrix) के विकर्ण तत्व 50, 60 और 80 MPa हैं। इस आव्यूह के प्रथम प्रतिबल अपरिवर्तनीय (first stress invariant) का मान ज्ञात कीजिए।

A cylindrical rod of 200 mm length and 30 mm diameter is subjected to an axial pull of 90 kN. What will be the approximate stress developed in the rod?

A cantilever beam of 5 m length carries a vertical uniformly varying load that varies from 0 at the free end B to a maximum value of 50 kN/m at the fixed end A. What is the Shear Force at a distance of 2 m from the free end B?