If the accelerometer measures a total acceleration of 10 m/s^2, and the acceleration along the X-axis is 6 m/s^2, what is the acceleration along the Y-axis?

We can use the Pythagorean theorem to find the acceleration along the Y-axis.
Acceleration along the Y-axis = √(10^2 – 6^2)
                                                    = √64 = 8 m/s^2.