Quote Originally Posted by insect111 View Post
OT:

how about relative velocities? let's say two objects travel toward each other at the same speed of 100km/h. the velocity of one object will be 200km/h relative to the other object, right? what if these same objects would travel at 75% of the speed of light? what will be the relative velocity of the first object with respect to the other?
Special theory of relativity, use light as a frame reference instead. Since the speed of light is constant in vacuum, the parameter that varies to maintain the speed of light for relatively moving objects is time. Classical relativity can not solve this paradox of problem you posed above. I think your query is very much on topic. hehehe