The word object is a very general term. A photon is also an object, and it does travel
at the speed of light. But it never travels at any other speed, so it doesn't "gain"
that speed. If we were to ask about objects made of atoms, then the answer is no,
they can never accelerate to the velocity of light. They can get arbitrarily close,
depending upon how much energy is used to accelerate them, but they can never
actually get to the full speed of light.
no
Gravity
That will depend not only on the escape velocity, but also - very importantly - on the object's speed.
the atom of the object will gain kinetic energy from the light
Yes The equation for momentum is mass x velocity So if you increase velocity the momentum increases
The maximum speed of any object is hardly equal to speed of light which is 3*10^8 approximately.
Mass is the sum of energies, both kinetic and potential. As the velocity increases so does the kinetic energy of object.
the object's 'velocity'
Then the object accelerates; its velocity changes.Then the object accelerates; its velocity changes.Then the object accelerates; its velocity changes.Then the object accelerates; its velocity changes.
No object that has mass when it's just sitting there on the table can move at the speed of light. Photons have zero "rest mass".
Photon or rather light
the velocity of an object is its speed and direction