Physics simulation is a method used to model and analyze physical systems through computational techniques. It allows scientists and engineers to predict how objects will behave under various conditions by using mathematical equations that represent the laws of physics. These simulations can visualize complex interactions, such as the motion of planets or the behavior of fluids. In various fields, including video games, engineering, and virtual reality, physics simulations help create realistic environments and interactions. By simulating forces like gravity, friction, and collision, developers can enhance user experiences and improve designs, making them more efficient and effective in real-world applications.