Electrostatic forces obey the principle of superposition, meaning the total effect from multiple charges is the sum of individual effects from each charge. A physical quantity is quantized if it can only take on discrete values, such as the energy levels of bound electrons, while a conserved quantity remains constant over time. The discussion highlights the distinction between linear and nonlinear systems, noting that electrostatic forces are typically linear, allowing for straightforward calculations of resultant forces. The conversation also touches on the nature of linearity in systems, emphasizing the importance of correctly identifying distances in calculations involving multiple charges. Understanding these principles is crucial for analyzing electrostatic interactions and their implications in various physical contexts.