What does impulse represent in physics?

Impulse in physics specifically refers to the change in momentum of an object when a force is applied over a period of time. This concept is critical in understanding the relationship between force, time, and the resulting change in motion.

According to the impulse-momentum theorem, the impulse experienced by an object is equal to the change in its momentum. Mathematically, impulse can be expressed as the integral of force over the time interval during which the force acts. This relationship is fundamental in analyzing collisions and other interactions where forces are applied, as it helps predict how an object will respond to external influences.

The other concepts, such as the force felt by an object, energy expansion, and distance traveled, do not accurately describe the definition or significance of impulse in the context of physics. While they represent important physical ideas, they fall outside the specific reasoning for impulse, which is tightly linked to changes in momentum. Understanding the correct interpretation of impulse allows for better analysis and prediction of an object's behavior in various scenarios involving forces and motion.