maemo.org - Talk - How accurate are the acceleration sensors of N9?

Hi,
does anybody know if the acceleration sensors of the N9 or the N900 are accurate enough to use them for measuring accelerations?
For example in one of my next physics lesson I want to measure the acceleration of a circular motion.
Here is a quick and dirty approach to measure the acceleration, if the N9 is fixed to the experiment with the dipsplay up or down.

Code:

import QtQuick 1.1

import QtMobility.sensors 1.1

import com.nokia.meego 1.0



Page {

    tools: commonTools

    property real a: 0



    function updateAcceltext(x,y){

     var a_new = Math.sqrt(x*x+y*y)

     if (a_new > a){

         a = (a_new/10*9.81).toFixed(2)

         txtAccelerometer.text = "Acceleration: \nX: " + a

        }

     }



    Accelerometer {

        id: accData

        active: true



        onReadingChanged: {

            updateAcceltext(reading.x,reading.y)

        }

    }



    Text {

        id: txtAccelerometer

        anchors.centerIn: parent

        text: "Accelerometer starting.."

        font.pointSize: 50

    }



}

Did I miss something?