Recent content by paulsterx

Oh ok sorry, I thought you might be referring to 2 well known (within the flat Earth community anyway) flat earthers and Covid deniers who both recently died, from covid.

Yes agreed, his diatribe is that because hoop stress is a tangential force and gravity is a radial force, there’s no way that gravity could oppose hoop stress. My point is that for (tensional) hoop stress to exist, there must be a net force acting away from the axis of rotation and that due to...

Of course not! Flat Earth and anti Vax go together like peas and carrots.

I don’t think he would, no. Don’t forget that flerfs don’t believe gravity even exists - they think objects fall due to density differential alone - yes, I know, density is a scaler and has neither magnitude nor direction. He’s read that hoop stress forces act ‘as if across the diameter’ and run...

Hi Chester, many thanks for your time, it’s much appreciated. I have a confession to make as I’ve not been entirely honest with you. The person I’ve been speaking to is a flat earther who has tried for a long time to use this argument (that tensional hoop stress is always present in a rotating...

Hi Chester, I’m sorry but I’m not trained in drawing free body diagrams, I’m not sure exactly what you’re after? I’m not an engineer and haven’t trained as one, which is why I’m asking this question here. It doesn’t need to get complex, take the simplest situation. Basically it’s 2 questions...

These are his words: “hoop stress is due to molecular bonds resisting a force that acts along the diameter created by spinning a solid body around a centre of mass…while outward radial force is due to orbiting said body about an axis away from its centre of mass…just because the equations for...

No, he thinks (I do not agree) that in a rotating disc the hoop stress is not caused by a radial force. My understanding is that hoop stress is basically the radial force (they are one and the same), measured tangentially rather than radially. He thinks that although there is hoop stress, that...

Ok, so essentially hoop stress is basically the radial force but measured in a different way, tangentially rather than radially?

Hi Chester, my understanding is that hoop stress in the ring is produced by the radial centrifugal forces experienced by that ring and is equivalent, in anyone specific direction, to the vector sum of the radial force magnitudes in that direction of one half of the ring. Were there to be an...

Thanks so much for your reply! Just to be sure can I ask what your thoughts are about what he thinks on this subject? In his words: “There is no radial force in an object that spins like a top, proven by the fact that there is no pulling force on the axis.” He quotes the Machinery Handbook: “if...

Hi, I have a question about hoop stress or tangential force acting within a spinning object such as a solid flywheel. As described in a textbook I’ve seen, the hoop stress tension force acting as if across the diameter of the object, trying to pull it apart, is a resultant of forces acting...