According to our current understanding of physics, objects with mass cannot reach or exceed the speed of light in a vacuum (c). As an object with mass accelerates, its energy requirements increase exponentially, approaching infinity as it approaches the speed of light. This means that it would require an infinite amount of energy to propel an object with mass to or beyond the speed of light.
From a theoretical perspective, if an object were to travel faster than light, it would violate the principles of causality and special relativity. According to special relativity, information and causal effects cannot travel faster than light, as it would lead to paradoxes such as time travel and violations of cause and effect relationships.
As an object with mass approaches the speed of light, its relativistic mass increases, time dilation occurs, and its length contracts in the direction of motion. These relativistic effects become more pronounced as an object accelerates, and they have been experimentally confirmed through various high-speed particle accelerators.
It's important to note that the concept of traveling faster than light is purely speculative at this point, and there is no scientific evidence or practical means to achieve it. Therefore, we don't have a complete understanding of what would happen if an object were to travel faster than light. Our current understanding of physics suggests that it is not possible for objects with mass to reach or exceed the speed of light, and attempting to do so would contradict the fundamental laws of physics as we know them.