According to the theory of special relativity, as an object with mass approaches the speed of light, its energy and momentum increase without bound. However, it would require an infinite amount of energy to accelerate a massive object to the speed of light, which is not physically achievable.
As an object with mass accelerates, its energy increases according to the equation:
E = mc^2 / sqrt(1 - (v^2 / c^2))
where: E is the total energy of the object, m is the rest mass of the object, v is the velocity of the object, and c is the speed of light.
As the velocity (v) approaches the speed of light (c), the denominator of the equation approaches zero, and the energy required to further accelerate the object increases without bound. In practical terms, it means that the energy required to accelerate an object with mass to the speed of light becomes infinite.
Therefore, it is not possible for an object with mass, such as a car, to reach or exceed the speed of light, regardless of how much its speed increases over time. The theory of special relativity sets an upper limit for the speed at which information or any object with mass can travel, and that limit is the speed of light in a vacuum.