A physics problem

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Rudi
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Re: A physics problem

Post by Rudi »

:rofl: x1000
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HansV
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Re: A physics problem

Post by HansV »

Brilliant! The office will look much more cheerful with those!
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ChrisGreaves
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Re: A physics problem

Post by ChrisGreaves »

John Gray wrote:... is to look at the surface of the liquid while walking, and you will automatically
... fall over a chair.
Or are Chris Greaves...
:laugh: :rofl: See my note above.
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Re: A physics problem

Post by ChrisGreaves »

hlewton wrote:Why not put less liquid in the cup? ...
Because then I'd have to make more trips during the day. Increasing the chance of chair-falling-over. :grin:
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Re: A physics problem

Post by ChrisGreaves »

Jay Freedman wrote:... with a flywheel built into the base of the cup ...
Thanks Jay; good to know that you're good 'til the last drop.
Your comment has, I hope, sent me on the right track.
I think back to those old Aussie movies of Old Aussies Boiling The Olde Aussie Billie and swinging the billy in grand circles (usually in a vertical plane) to settle the leaves, and thought, "What if I were to spin on my vertical axis at a high rotational rate, holding the mug at arm's length with the base farthest (US: furthest) away from me. Centrifugal Force (Rudi was on the right track!) should keep the mug full until I (gracefully) slow down my rotation as I reach the chair in which I am supposed to sit, in one fell swoop.

No wait! There's More!!
What if I mounted the bicycle wheel on a trolley platform and stepped onto the bike wheel; a motor starts it (with me) spinning (subroutine to Centrifugal Force above) and with my spare hand I push off from the kitchen and roll horizontally on the trolley while rotating at high speed on the bicycle wheel platform.

Before crashing into my chair.

OK. needs a bit more work ....
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Re: A physics problem

Post by ChrisGreaves »

Leif wrote:Anything to stabilise him...
:laugh: :rofl: :clapping:
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Re: A physics problem

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Rudi wrote:When/where can I buy one. :grin:
AMAZON! :laugh: :rofl:

(Ask Bob ...) :flee:
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BobH
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Re: A physics problem

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ChrisGreaves wrote:
Jay Freedman wrote:... with a flywheel built into the base of the cup ...
Thanks Jay; good to know that you're good 'til the last drop.
Your comment has, I hope, sent me on the right track.
I think back to those old Aussie movies of Old Aussies Boiling The Olde Aussie Billie and swinging the billy in grand circles (usually in a vertical plane) to settle the leaves, and thought, "What if I were to spin on my vertical axis at a high rotational rate, holding the mug at arm's length with the base farthest (US: furthest) away from me. Centrifugal Force (Rudi was on the right track!) should keep the mug full until I (gracefully) slow down my rotation as I reach the chair in which I am supposed to sit, in one fell swoop.

No wait! There's More!!
What if I mounted the bicycle wheel on a trolley platform and stepped onto the bike wheel; a motor starts it (with me) spinning (subroutine to Centrifugal Force above) and with my spare hand I push off from the kitchen and roll horizontally on the trolley while rotating at high speed on the bicycle wheel platform.

Before crashing into my chair.

OK. needs a bit more work ....
Somehow this description put me in mind of Keystone Kops! :rofl:
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HansV
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Re: A physics problem

Post by HansV »

How about a thermos bottle?
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ChrisGreaves
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Re: A physics problem

Post by ChrisGreaves »

Don Wells wrote:... in a cylindrical container and found that when the container is tipped ...
Yabbut. (Spoken like a true Canadian) ...
(1) My mugs are not cylindrical; they are tapered, narrowing towards the base and
(2) I'm not tipping the container at all (excepting see "chair" above), just trying to walk steadily holding the mug as close to vertical as I can.
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Rudi
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Re: A physics problem

Post by Rudi »

And another alternative is a...
Spoiler
...MEGA-straw...
mega straw.jpg
don't worry, he's not nude...I think...
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HansV
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Re: A physics problem

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Rudi, that's the last straw! Did you really have to post that picture?
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Leif
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Re: A physics problem

Post by Leif »

Forget spinning wheels and half-naked straws, what you actually need is a gimbal.
Leif

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Rudi
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Re: A physics problem

Post by Rudi »

Maybe a bit disturbing.... :laugh:
This one is more gentle on the eyes....
Spoiler
mega straw.jpg
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Re: A physics problem

Post by PJ_in_FL »

Leif wrote:Forget spinning wheels and half-naked straws, what you actually need is a gimbal.
That's exactly what I was thinking for a non-spinning solution. A holder with dual axis:
Spill-proof Teacup.jpg
The cup (purple) is held by two metal rings (dark and light blue) rotatable around the two axes (red). When held by the handle (green) gravity will hold the cup upright due to the weight of the cup and tea.
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Leif
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Re: A physics problem

Post by Leif »

Impossible to drink out of though - you'd need a straw...
Leif

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Rudi
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Re: A physics problem

Post by Rudi »

Leif wrote:Impossible to drink out of though - you'd need a straw...
Yep.... a MEGA straw... :grin:
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Rudi

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HansV
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Re: A physics problem

Post by HansV »

There are plenty of gimbal cup holders, but they're not for walking around - they are for use on a boat or perhaps a car, fixed to mast or dashboard.

This one is for holding in your hand, but it doesn't seem to work very well: Double Gimbal Drink Holder: NEVER spill your Root Beer!
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Re: A physics problem

Post by PJ_in_FL »

Leif wrote:Impossible to drink out of though - you'd need a straw...
Not really. The cup is attached to the gimbal ring above the center of mass, but doesn't have to be attached at the lip.

Hans, those are cup holders. This is the cup itself for the "steady" challenged among us! :laugh:
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Re: A physics problem

Post by ChrisGreaves »

BobH wrote:Don't look at the cuppa. ...
I just tried this.
Not watching the mug while you walk does not obviate the spillage; it merely means that you don’t see it spill which, providing it spills on an expensive Persian rug or similar pattern, means the spillage is undetected, leading one to the false conclusion that spillage did not occur! :sad:
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