Thank you both.
Why more and more slowly as it gets closer to c? Is there some type of additional resistance or counter force that causes the decrease in acceleration as c is approached?
From a quick search of the forum is appears that an increase in velocity does not result in an increase in mass. If this is correct why can't objects be accelerated to light speed and beyond?
If every action causes an equal and opposite reaction, what force stops an object from reaching light...