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an accelerometer consists of a mass(proof mass). say the proof mass is

x kg. The accelerometer sensed the acceleration of the proof mass.

suppose the accelerometer reading is y can i say the force acting on the proof mass is x.y?

Some theory says that the accelerometer measures the acceleration of the surface on which it is attached.

Which is true. The accelerometer measure the acceleration of the proof mass or

The accelerometer measure the acceleration of the surface on which the instrument is attached.

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# Accelerometer -proof mass

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