Hi Naifar,
The acceleration is the rate of change of the velocity of an object. At the same time, the velocity is the rate of change of the position of that same object. In other words, the velocity is the derivative of the position and the acceleration is the derivative of the velocity.
please refer this document for how to determine velocity
http://cache.freescale.com/files/sensors/doc/app_note/AN3397.pdf
can this help you?
Have a great day,
Zhang Jun
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