According to our current understanding of physics, as described by Albert Einstein's theory of relativity, it is not possible to accelerate an object with mass to the speed of light. As an object with mass approaches the speed of light, its relativistic mass increases, and it would require an infinite amount of force to accelerate it to that speed.
The equation that describes the relationship between an object's relativistic mass (m), its rest mass (m₀), and its velocity (v) is:
m = m₀ / sqrt(1 - (v²/c²))
In this equation, c represents the speed of light in a vacuum, approximately 299,792,458 meters per second.
As an object with mass approaches the speed of light (v → c), the denominator of the equation approaches zero, causing the relativistic mass to become infinite. Thus, it is impossible to achieve or exceed the speed of light for an object with mass.
It's worth noting that massless particles, such as photons, can travel at the speed of light in a vacuum. However, they do not experience mass in the same way as objects with rest mass.