आधार 'b' और ऊंचाई 'h' वाले एक त्रिकोणीय खंड का उसके आधार के समानांतर केंद्रक अक्ष (centroidal axis) के परितः जड़त्व आघूर्ण (moment of inertia) कितना होता है?

In standard assumptions made for plane truss structures, the connections between members are assumed to be joined by:

The coefficient of friction is theoretical value of _____ for ideal, perfectly smooth surfaces.

In the analysis of structures by the principle of Virtual Work, which of the following forces are assumed to do work and are not omitted?