5 ms·
The point is only that the accelerometer is measuring force. If you put your phone on a centrifuge long enough so that it reads a constant force going into it,
by taeric 2y ago
The point is only that the accelerometer is measuring force. If you put your phone on a centrifuge long enough so that it reads a constant force going into it, you would be able to make a situation in deep space where it reads 9.8m/s in what feels like a constant direction to any human. Right? How would the accelerometer be able to detect that?
- wrs 2y agoThe accelerometer will read 9.8m/s^2 along the axis of the centrifuge, because that is the acceleration that is keeping the phone moving in a circle instead of flying into space. The difference between that and resting the phone on the Earth is that the centrifuge structure is accelerating it by exerting force on it, whereas the Earth is accelerating it by altering the spacetime metric in its vicinity. Completely different mechanisms, same reading.
- taeric 2y agoMy point was the accelerometer would not be enough to expose what is happening. Imagine a centrifuge large enough that you can't determine the angle.