[ThoraxDrew]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

[Tom Bishop]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

[Northman77]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

Tom, can you describe the feeling of earth pushing up against your body? I can’t say I feel that. It feels more like I am pressing against earth.

I am familiar with your chair analogy, but how do you explain the feeling of falling? That feeling differs significantly from the feeling of a object coming towards you at speed. Then again feelings are rather subjective...

[sleepybadger]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

Tom, can you describe the feeling of earth pushing up against your body? I can’t say I feel that. It feels more like I am pressing against earth.

I am familiar with your chair analogy, but how do you explain the feeling of falling? That feeling differs significantly from the feeling of a object coming towards you at speed. Then again feelings are rather subjective...

Feelings are subjective but accelerometers aren't.

I'm not an expert and I'm happy to be proved wrong here, but if an accelerometer measures change in velocity then surely if UA was real then an accelerometer placed on the floor would measure a constant acceleration upwards? On the other hand if gravity is real then an accelerometer placed on the floor would measure nothing as it would not be moving.

Right?

[Curious Squirrel]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

Tom, can you describe the feeling of earth pushing up against your body? I can’t say I feel that. It feels more like I am pressing against earth.

I am familiar with your chair analogy, but how do you explain the feeling of falling? That feeling differs significantly from the feeling of a object coming towards you at speed. Then again feelings are rather subjective...

Feelings are subjective but accelerometers aren't.

I'm not an expert and I'm happy to be proved wrong here, but if an accelerometer measures change in velocity then surely if UA was real then an accelerometer placed on the floor would measure a constant acceleration upwards? On the other hand if gravity is real then an accelerometer placed on the floor would measure nothing as it would not be moving.

Right?

Incorrect actually. Relativity. You cannot tell the difference between a uniform field of gravity, and uniform acceleration. This is the reason the UA idea can even exist. Whatever Tom wishes to proclaim (or an REer for that matter) you cannot measure or detect a difference between the two. His chair proclamation and comparing it to anyone's question about an outside observer are both equally irrelevant. An evenly accelerating Earth and a gravity field would both produce the same two results.

[sleepybadger]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

Tom, can you describe the feeling of earth pushing up against your body? I can’t say I feel that. It feels more like I am pressing against earth.

I am familiar with your chair analogy, but how do you explain the feeling of falling? That feeling differs significantly from the feeling of a object coming towards you at speed. Then again feelings are rather subjective...

Feelings are subjective but accelerometers aren't.

I'm not an expert and I'm happy to be proved wrong here, but if an accelerometer measures change in velocity then surely if UA was real then an accelerometer placed on the floor would measure a constant acceleration upwards? On the other hand if gravity is real then an accelerometer placed on the floor would measure nothing as it would not be moving.

Right?

Incorrect actually. Relativity. You cannot tell the difference between a uniform field of gravity, and uniform acceleration. This is the reason the UA idea can even exist. Whatever Tom wishes to proclaim (or an REer for that matter) you cannot measure or detect a difference between the two. His chair proclamation and comparing it to anyone's question about an outside observer are both equally irrelevant. An evenly accelerating Earth and a gravity field would both produce the same two results.

Thanks - I was trying to get my head around that for a while. After posting I thought actually the accelerometer would still show some force being applied by gravity even if not moving. I'm still curious though how things like a feeling of falling can exist in the UA model.

Let's say I'm standing at the top of a tall building and I jump off.

Under the UA model as I leave the building I'm no longer being accelerated along with the earth. Instead, I'm travelling at constant velocity. However, the earth is accelerating up to meet me.

So what causes a feeling of falling in this model?

Or in reality, for that matter?  I thought in the real world a falling sensation is when you feel that you're being accelerated downwards. When you reach terminal velocity, you don't feel like you're falling anymore. It's like you're floating in the air, albeit with a 100mph wind in your face.

[Curious Squirrel]

Flat earthers say that the earth isn't spinning because we can't feel it spinning. Why can't we feel the earth infinitely accelerating if it is?

You don't feel the earth pushing up against your body?

Tom, can you describe the feeling of earth pushing up against your body? I can’t say I feel that. It feels more like I am pressing against earth.

I am familiar with your chair analogy, but how do you explain the feeling of falling? That feeling differs significantly from the feeling of a object coming towards you at speed. Then again feelings are rather subjective...

Feelings are subjective but accelerometers aren't.

I'm not an expert and I'm happy to be proved wrong here, but if an accelerometer measures change in velocity then surely if UA was real then an accelerometer placed on the floor would measure a constant acceleration upwards? On the other hand if gravity is real then an accelerometer placed on the floor would measure nothing as it would not be moving.

Right?

Incorrect actually. Relativity. You cannot tell the difference between a uniform field of gravity, and uniform acceleration. This is the reason the UA idea can even exist. Whatever Tom wishes to proclaim (or an REer for that matter) you cannot measure or detect a difference between the two. His chair proclamation and comparing it to anyone's question about an outside observer are both equally irrelevant. An evenly accelerating Earth and a gravity field would both produce the same two results.

Thanks - I was trying to get my head around that for a while. After posting I thought actually the accelerometer would still show some force being applied by gravity even if not moving. I'm still curious though how things like a feeling of falling can exist in the UA model.

Let's say I'm standing at the top of a tall building and I jump off.

Under the UA model as I leave the building I'm no longer being accelerated along with the earth. Instead, I'm travelling at constant velocity. However, the earth is accelerating up to meet me.

So what causes a feeling of falling in this model?

Or in reality, for that matter?  I thought in the real world a falling sensation is when you feel that you're being accelerated downwards. When you reach terminal velocity, you don't feel like you're falling anymore. It's like you're floating in the air, albeit with a 100mph wind in your face.

The feeling of falling is essentially a sort of neurological response. Gravity pulls at all of you equally. People who base jump and similar a lot tend to experience less of the 'stomach in throat' sort of thing as those who do it less. From my reading last time this came up, we're still not truly 100% sure just what causes the sensation. These are sort of best guesses. But theoretically there should be no discernible difference. To assert there is would be to throw Relativity out the window, for which you'll need some rather compelling evidence.