According to our current understanding of physics, it is not possible for objects with mass to travel faster than the speed of light in a vacuum. As an object with mass approaches the speed of light, its relativistic mass increases, requiring an infinite amount of energy to accelerate it to or beyond that speed. This limitation is described by Einstein's theory of relativity.
If an object were somehow able to travel faster than light, it would violate the principles of causality and lead to paradoxes such as time travel and violations of the known laws of physics. This is known as the "causality problem" or "Lorentz-FitzGerald contraction."
As for the second part of your question, if an object were hypothetically able to travel faster than light, it would encounter several consequences. One of these consequences is known as "time dilation." According to the theory of relativity, as an object approaches the speed of light, time dilation occurs, meaning that time slows down for the moving object relative to a stationary observer.
As a result, if an object were traveling faster than light, it would experience extreme time dilation, making it difficult or impossible for the object to interact or observe other objects that are moving at slower speeds. From the perspective of the object traveling faster than light, time for the rest of the universe would effectively appear to be running at a different rate.
However, it's important to emphasize that currently, there is no known method for surpassing the speed of light, and these hypothetical scenarios are based on the understanding of physics as we know it today.