किस प्रकार का आलंब (support) केवल घूर्णी गति (rotational movement) की अनुमति देता है लेकिन क्षैतिज और ऊर्ध्वाधर दोनों बलों का विरोध करता 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: