एक रेखीय प्रत्यास्थ संरचना के लिए, निम्नलिखित में से कौन-सा सिद्धांत यह बताता है कि जब केवल बाहरी बल विकृति का कारण बनते हैं, तो अनुपूरक ऊर्जा (complementary energy) विकृति ऊर्जा के बराबर होती है?

What is the value of maximum shear force for a simply supported beam of length 6.0 m, subjected to a uniformly distributed load (w kN/m) throughout the span, for which the bending moment equation at a section from the left support situated at 'x' m is Mx = 30x - 0.5(wx2)?

Method of joints is applicable to calculate member forces of a truss, when the number of unknown forces at the joint under consideration is not more than: