According to our current understanding of physics, it is not possible for an object with mass to travel at or exceed the speed of light in a vacuum. The theory of relativity, specifically Einstein's special theory of relativity, states that as an object with mass approaches the speed of light, its relativistic mass increases, requiring more and more energy to accelerate it further. At the speed of light, an object with mass would require an infinite amount of energy, which is not feasible.
If we were to speculate on what would happen if an object could somehow surpass the speed of light, we would be entering the realm of speculative physics. It is important to note that such speculations are highly theoretical and not supported by current scientific evidence.
One possibility often discussed in theoretical physics is the concept of time dilation. According to the theory of relativity, as an object approaches the speed of light, time slows down for that object relative to an observer at rest. If an object were to exceed the speed of light, some theories suggest that time could reverse, causing a range of paradoxes and contradictions.
However, it is important to emphasize that these scenarios are purely hypothetical and go beyond our current understanding of physics. The principles of causality and the conservation of energy and momentum, among other fundamental laws, are deeply rooted in our understanding of the universe. Therefore, it is currently unknown what would happen if an object were to surpass the speed of light, and it is a topic of ongoing scientific inquiry and debate.