title: Accelerometer's G Value, for detecting a car crash, an experimental Android application
body: <p>I am developing an android app which can detect crash of vehicle, by measuring its changing acceleration nd G value,
  How to calculate G value?
  Nd
  How much G value is needed to detect crash?
  Nd
  How to detect very big shake event using accelerometer?.</p>
  
  <p>My app is my BSCS final project, please help.</p>
  
  <p>Note: i actually measured G value, nd set 12 G as trigger, but 12 G is variates on different mobiles, on some mobile it takes more svere crash nd on some mobiles it reaches to 12 instantly,
  Does different accelemeters behave differently?</p>