We can not give the value of X, because we don\'t know what train B is made of.
Also, we don\'t know about the gravitational field in question. We are
forced to assume that we are using Earth-normal gravity for the purposes of this
problem, which may or may not be correct. Further, atmospheric density may
also be a factor.
And is sarcasm a part of the problem? If so, is it value C, or is it value S? Does
sarcasm affect gravity? Or is it true that there is no gravity, and the earth just
sucks?
As regards the piece of string... is it a quantum string? Or are they just
theoretical? If both trains are travelling along a quantum string, then the value
of X is clearly 0. Travel is instantaneous.
Sarcasm is not necessarily the lowest form of wit. It depends on the altitude
of the speaker. If he\'s in Denver, he\'s a lot higher than someone in New York
City who\'s doing slapstick.
And where does the fart joke come in, in terms of wit? Above or below sarcasm?