Time is not considered a fundamental force like gravity or electromagnetism. In physics, time is typically regarded as a fundamental dimension or parameter that allows us to measure and describe the sequence and duration of events. It is a fundamental aspect of our experience and perception of the universe.
In the framework of classical physics, time was treated as an independent and absolute entity that flowed uniformly and independently of other physical quantities. However, with the advent of Albert Einstein's theory of relativity, our understanding of time evolved.
According to the theory of relativity, time is intimately intertwined with space, forming the concept of spacetime. Spacetime is a four-dimensional framework that incorporates three dimensions of space and one dimension of time. In this framework, the flow of time is not absolute but depends on the relative motion and gravitational field of an observer. The theory of relativity introduced the concept of time dilation, where time can pass differently for observers in relative motion or in different gravitational fields.
In modern physics, the fundamental forces of nature, such as gravity, electromagnetism, the strong nuclear force, and the weak nuclear force, are typically described and understood through mathematical frameworks like quantum field theory and general relativity. Time, on the other hand, serves as a parameter within these frameworks rather than being considered a fundamental force itself.
It's worth noting that our understanding of fundamental forces and the nature of time is still a subject of active research and exploration, particularly in the context of reconciling quantum mechanics and general relativity through theories like quantum gravity.