Physical force refers to the push or pull exerted on an object, resulting in a change in its motion or shape. This concept is fundamental in physics and can be observed in everyday situations, such as when a person pushes a door open or when gravity pulls an object towards the Earth. There are different types of physical forces, including friction, gravity, and tension. Each of these forces plays a crucial role in how objects interact with one another. Understanding physical force helps explain various phenomena, from the movement of vehicles to the behavior of planets in space.