Torque

[Merecat]

Having pondered this for several seconds, my brain has returned a null pointer exception.
At the moment all my attention is fully taken with Eve Muirhead and Anna Sloan (and the other two)
Normal service may not be resumed for a while

[tanneman]

You have finally figured it out. It is all theory.

[Corvus]

You have finally figured it out. It is all theory.

Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago.

[Boxermed69]

You have finally figured it out. It is all theory.

Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago...

...this thread started

[Corvus]

You have finally figured it out. It is all theory.

Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago...

...this thread started

I am deeply chagrined.

[Corvus]

Infinite, it is used only for calculations. You would not be able to see it with the naked eye, that is why the theory regarding physics, chemistry and maths works.

It's a very weird place!

Dimensionless, except for length (unless it is an infinitely thin disc! )

Going back to my question "is there any place on a spinning disc or shaft where the angular velocity is zero?". If the centre is at infinity then every part of the disc will experience angular velocity! And yet books tell you that the centre is motionless. Go figure!

Is infinity truly the right expression for the centre? We never reach infinity and yet the centre or axis "point" must be there?

I suppose it is the same for any "point"on a scale. The actual position itself doesn't have a dimension. It does on our steel rule or tape, so that we can see it. But in the theoretical sense it doesn't.

Weird!

Fascinating.

Blimey corvus, if you think that's weird what about time? We like to split time up into chunks, the same way we do with distance (space). So just how small a fraction is "now"?

[Corvus]

Infinite, it is used only for calculations. You would not be able to see it with the naked eye, that is why the theory regarding physics, chemistry and maths works.

It's a very weird place!

Dimensionless, except for length (unless it is an infinitely thin disc! )

Going back to my question "is there any place on a spinning disc or shaft where the angular velocity is zero?". If the centre is at infinity then every part of the disc will experience angular velocity! And yet books tell you that the centre is motionless. Go figure!

Is infinity truly the right expression for the centre? We never reach infinity and yet the centre or axis "point" must be there?

I suppose it is the same for any "point"on a scale. The actual position itself doesn't have a dimension. It does on our steel rule or tape, so that we can see it. But in the theoretical sense it doesn't.

Weird!

Fascinating.

Blimey corvus, if you think that's weird what about time? We like to split time up into chunks, the same way we do with distance (space). So just how small a fraction is "now"?

Er........

[Corvus]

A perfect cone. Just how narrow is the very tip. Infinity? Or zero?

Somebody ought to take a look at these bloody axioms. They need sorting out.

[SP250]

Ah - but which way up is the cone?.............
And does it really matter?

[Corvus]

Ah - but which way up is the cone?.............
And does it really matter?

The pointy end.

I'm imagining a representation of a cone rather than a solid, so I guesss it could equally apply to a triangle. I'm using perfect lines, so they'd be infinitely thin. If we follow the cone to the end then continue on, then at some point the cone won't be there. But at that instant, how small is the pointy bit?

it seems to be both infinity and zero!

You can tell I'm no mathematician.