Accelerometer
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If I have an accelerometer and I drop it and it undergoes freefall, the accelerometer will not read anything.
With that in mind, let's say I'm in outer space. I drop my accelerometer towards Earth. All of a sudden, some crazy aliens appear out of no where. They instantaneously move the Earth 90 degrees from the direction the accelerometer was travelling. Now the device turns 90 degrees to fall towards Earth at the new location.
What would the accelerometer read during this event? Would it be zero the whole time? At no point was it not under free-fall conditions so I think it would read zero but I'm not sure. It's also counterintuitive if an object could turn 90 degrees and not read an acceleration.
>>7671532
>If I have an accelerometer and I drop it and it undergoes freefall, the accelerometer will not read anything.
uhmm, what about gravity?
>>7671540
This, what a retard
>>7671532
Well the aliens would be doing some serious warping of spacetime by definition so it doesn't seem that counterintuitive.
>>7671540
is this bait?
>>7671540
>>7671546
OP here.
>>7671554
Does it strike you as strange that an object can travel a curved path and not really feel anything (no registered forces)?
>>7671532
Best bait I've seen so far
>>7671852
not if it's travelling through curved space
Accelerometers normally measure the movement of a spring suspending a mass inside the device as it conforms to changes in the encasing mass with respect to the suspended mass. An accelerometer reads zero during free-fall because the force of gravity works equally on the encasing mass and the suspended mass so there is no differential and thus no spring motion. This will be the same no matter how you spontaneously re-arrange things.
Provided you have a sufficiently sensitive accelerometer, you would detect some accleration due to tidal effects and the fact that earth has a non-uniform gravitational field
>>7671532
Satellites move on curved paths but are in constant freefall and thus experience "weightlessness".
>>7671540
>drop
>in space
holy fuck you're an idiot saging this 100% faggotry clearly you were dropped on your head as a baby you fucking retard
>>7671532
>he labeled the -z direction "+z"
>>7672081
>It's completely arbitrary
>>7671852
Like, orbiting?
>>7672100
Don't embarrass yourself.
>>7672024
Tell me how -g is not a reading you dumb memer, 0 is not a reading.
>>7671532
Redo high school physics
>>7672081
Don't be mean to lefties, don't you think their life is miserable enough?
>>7672231
>lefties
>needing the "reflect about xy" mapping to accomplish basic tasks
>don't even masturbate correctly
>>7672081
It's quite often easier when you are working with force in the same direction
>>7672149
what
So then riddle me this:
If I'm free-falling towards Earth or I'm free-falling towards a larger body, like the sun, it would feel the same on my body? Accelerometers would both read zero?
Is it possible to distinguish between either case (assume you don't have an outside reference frame (you're in the falling reference frame) and need to clean off the windows so you can't see outside the lab)?
>>7672856
If you're talking without atmosphere and not talking extreme cases like black holes, then there would be no practical difference. Our internal accelerators work pretty much the same as the ones we've invented. I believe it's all just done by inner-ear fluid, but don't quote me on that.