Physics simulations are computer-based models that replicate real-world physical systems and phenomena. They use mathematical equations to predict how objects behave under various conditions, such as motion, forces, and energy interactions. These simulations help scientists and engineers visualize complex processes, test theories, and design experiments without the need for physical prototypes. In fields like astronomy, engineering, and video game development, physics simulations play a crucial role. For example, they can simulate the gravitational pull of planets, the flow of fluids, or the collision of objects. This allows researchers and developers to explore scenarios that would be difficult or impossible to recreate in real life.