6 ms·
Yes, this is only about physics for me too. My physics does check out though. If you are in a car and it accelerates from 0 to 30 mph you will experience the sy
by bronz 11y ago
Yes, this is only about physics for me too. My physics does check out though. If you are in a car and it accelerates from 0 to 30 mph you will experience the symptoms of acceleration. For example, an object that is hanging from a string in your frame of reference, such as a fuzzy dice hanging from the mirror, will appear to move backwards on its own. Try holding the fuzzy dice while running on a treadmill. I guarantee you won't see anything like that happen. Because you are not accelerating.
- shamino 11y agoIn your argument, your string and fuzzy die are not measured with respect to the surface of the treadmill, which is the frame-of-reference you should be considering. If you think of it this way, then yes, your fuzzy die will "lean forward". You absolutely do experience acceleration when you're on the treadmill, how do you think you go from 0 mph to 5 mph ? With respect to the ground of the earth, then there is no acceleration horizontally. With respect to the surface of the treadmill (which is what you must now consider), then yes. Just think of exercise. I challenge you to run 100 miles on the treadmill and not get tired.
- ADSSDA 11y agoI don't think you understand the arguments people are making. Your inner ear does not experience any acceleration in your example, which is what is required to avoid sickness. What's happening relative to the surface of the treadmill doesn't matter, the acceleration of your inner ear does, and that's not changing.
- shamino 11y agoHow does my inner ear know I'm accelerating on the treadmill or the ground ? What if I blindfolded myself ? The treadmill is just like the ground, for all intents and purposes.
- ADSSDA 11y agoIs your head accelerating while you're on the treadmill? I've never seen a treadmill where that happens, the whole idea of a treadmill is running in-place. The most common VR treadmill-ish device I'm aware of is the Virtuix Omni: http://www.virtuix.com/ http://www.virtuix.com/, where your head is clearly not accelerating. What are you picturing when you claim your head (and hence inner ear) is accelerating on a treadmill?
- shamino 11y agoI'm starting to understand yours and everyone replies. I think what I had in mind is that I'm accelerating relative to a point on the treadmill, and therefore my entire body is accelerating. I can't wrap my head around the fact that we're still considering the ground as the frame of reference. I know that the treadmill moves on its own, but what if I push the surface of the treadmill to make me move forward. Wouldn't I not know the difference between a sidewalk and the treadmill ?
- ADSSDA 11y agoThe ground as a point of reference isn't really relevant, it's your previous position that matters (new position relative to your old position). Acceleration requires a change in trajectory, and no matter what the treadmill is doing, if you are not changing your trajectory you are not experiencing acceleration (ignoring the effects of gravity).
- shamino 11y agoThanks for taking the time with me. Acceleration for me is a change in a velocity - isn't that what is going on ? Velocity is a change in distance, and to me it seems there must be a change in distance - since there is energy being spent (we're "traveling" as we run, while putting in the force of our feet against the treadmill - each step is an "acceleration" forward).
- 11y ago
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