In a running event, the rate at which the velocity changes concerning time is known as:

Correct option is D

The correct answer is (d)
Acceleration is a fundamental concept in physics, describing the rate of change of velocity with respect to time. Understanding acceleration is crucial In various fields, from classical mechanics to modern technology, as it provides insights into how objects move and interact with their environment. At its core, acceleration represents how quickly an object’s velocity changes over time. Velocity, in turn, is the rate of change of an object’s position with respect to time. Therefore, acceleration is the second derivative of an object’s position with respect to time, or the first derivative of velocity with respect to time.