Real simple. In terms of horizontal dimensions (X and Y)
if the max an accelerometer can output is, say, 3g's, then does that mean the most it can measure is 3 x 9.81 m/s^2 or what?
(9.81 being acc. due to grav)
um, yes.
Great 
Just starting to take physics in high school now (yea, I'm that young), so my understanding of certain concepts is infinitesimally near 0.