Physics-based simulations are computer-generated models that replicate real-world physical phenomena. They use mathematical equations to mimic how objects behave under various forces, such as gravity, friction, and collision. These simulations are widely used in fields like engineering, video game development, and virtual reality to create realistic environments and interactions. These simulations help researchers and designers visualize complex systems and predict outcomes without the need for physical prototypes. For example, automotive engineers can test how a car will perform in a crash scenario, while game developers can create lifelike movements for characters and objects in their games.