👉 Instantaneousness is a concept in physics and engineering that refers to the speed of change or movement. It describes the rate at which an object's position, velocity, or acceleration changes over a small time interval. Instantaneous quantities are typically measured in units such as meters per second squared (m/s²), but they can also be expressed in terms of radians per second or other units depending on context. In everyday language, instantaneousness is often used to describe the speed at which an object is moving