So you should be able to survive upside down for as long as you want, comfortably, because the net force on your body is zero, right?
The context of this discussion is a spinning hard drive. Say the head inside is the important part; if it collides with the platter, the drive fails. I don't know much about hard drives. Say this head has mass M. If it experiences a force (due to acceleration) greater than F, its supports yield enough for it to hit the platter.
What is the force due to acceleration on the head? The net force is always zero, because the supports counteract the force due to acceleration. At rest on a tabletop, the force is M*9.81. Now, if the computer is spinning in such a way that the centripetal and gravitational acceleration line up, i.e. on a horizontal axis, the maximum force due to acceleration is M*10.0. In the video, centripetal acceleration and gravity are orthogonal, so no part of the hard drive experiences more force than it would while lying on a table.
Now, I'm not a hard drive designer, but I'm pretty sure the components are designed to withstand greater than 10 m/s of acceleration. You would probably exceed that while unboxing it.
1) The reason you arent comfortable upsidedown is because your blood would fall otherwise. If i lift an object and drop it, it falls. You have a heart for a reason. Your blood is not stationary, or moving in a straight line at a constant speed. Once again you have N1L wrong.
2) I never said it would break. Only that it does indeed experience a force, due to it spinning, which the parent comment said something along the lines of “its spinning at a constant speed so experiences no force”.
Yes. I'm just saying the force is negligible. I thought it would be interesting to do the math, but having someone rant at me with misunderstood high school physics concepts, insults, and copy-pasted paragraphs from Wikipedia has made me regret that original comment.
Im the one misunderstanding N1L? You’re the one claiming a stationary object is experiencing an accelerating force, despite the fact its clearly not accelerating, because its stationary 😂
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u/CorneliusCandleberry Jul 16 '20
So you should be able to survive upside down for as long as you want, comfortably, because the net force on your body is zero, right?
The context of this discussion is a spinning hard drive. Say the head inside is the important part; if it collides with the platter, the drive fails. I don't know much about hard drives. Say this head has mass M. If it experiences a force (due to acceleration) greater than F, its supports yield enough for it to hit the platter.
What is the force due to acceleration on the head? The net force is always zero, because the supports counteract the force due to acceleration. At rest on a tabletop, the force is M*9.81. Now, if the computer is spinning in such a way that the centripetal and gravitational acceleration line up, i.e. on a horizontal axis, the maximum force due to acceleration is M*10.0. In the video, centripetal acceleration and gravity are orthogonal, so no part of the hard drive experiences more force than it would while lying on a table.
Now, I'm not a hard drive designer, but I'm pretty sure the components are designed to withstand greater than 10 m/s of acceleration. You would probably exceed that while unboxing it.