The force that opposes the motion of an object is known as friction. It acts in the opposite direction of the object's movement and occurs when two surfaces come into contact. Friction can vary based on surface texture and the materials in contact, and it plays a key role in everyday activities. For instance, it enables vehicles to accelerate and decelerate, contributes to grip while walking, and is essential in various mechanical systems. While friction is vital for control, it can also lead to energy loss through the form of heat, impacting efficiency in mechanical devices.