In recent years, prosthetic limb technology has seen significant advancements, drivenlargely by improvements in materials and biomechanics. However, there remain numerouschallenges in improving the performance, energy efficiency, and comfort of these devices.This paper explores the use of physics-based models in optimizing lower-limb prosthetics.The focus is on leveraging principles from biomechanics, mechanics, and materials scienceto design prosthetics that mimic human gait while improving energy expenditure, motiondynamics, and overall user comfort. This study involves creating biomechanical models,simulating various prosthetic designs, and developing optimization algorithms to address theshortcomings of current prosthetic limbs. Through this research, we aim to offer a moreefficient, comfortable, and cost-effective solution to individuals who rely on prosthetics formobility.