Re: The mass-velocity relationship and the light speed speed limit.

The mass-velocity relationship would not ensure that the particle
accelerates over the speed of light since the additional mass would not
accelerate it.
"The acceleration of an object depends directly upon the net force
acting upon the object, and inversely upon the mass of the object. As
the force acting upon an object is increased, the acceleration of the
object is increased. As the mass of an object is increased, the
acceleration of the object is decreased."
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https://physics-network.org/does-acceleration-increases-as-mass-increases-why/
This is not true in gravity free space.