यदि किसी भार उठाने वाली मशीन (lifting machine) की दक्षता को स्थिर रखा जाता है, तो उसका वेग अनुपात (velocity ratio) किसके सीधे आनुपातिक 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?