Mechanical principles are the fundamental concepts that explain how forces and motions interact in physical systems. These principles include concepts like force, mass, and acceleration, which are often described by Newton's laws of motion. Understanding these principles helps us analyze how objects move and respond to different forces. In addition to motion, mechanical principles also cover topics such as energy, work, and power. These concepts help us understand how energy is transferred and transformed in machines and structures, allowing engineers to design efficient systems. Overall, mechanical principles are essential for understanding the behavior of physical objects in our world.