A mechanics diagram is a physical representation of a mechanical process. Educators and instructors use it extensively to provide students with a detailed and realistic description of the complex physical-mechanical mechanism so that students can properly know and comprehend physical principles and laws and improve their skills. A mechanics diagram is a physics and engineering schematic that depicts the applied forces, moments, and subsequent responses on a body in a given state. A mechanical system drawing is a type of technical drawing that shows heating, ventilation, and air conditioning. It is a powerful tool for analyzing complex systems. These drawings are frequently a set of detailed drawings used for construction projects; they are required for all HVAC systems.