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#21
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Strangest Tire Question EVERRR...
Steve W.
No difference, even though the atmosphere, and the human, are not inside a container, as with the air in a tire? |
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#23
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Strangest Tire Question EVERRR...
In response to what Heron > wrote :
> Obviously. Not worth discussing with those who mistake > and interchangeably use the terms force and pressure. > Don't get them started on energy and power. While... o Force = pressure per unit area What always confuses me are things like centrifugal versus centripedal forces (yes, I know, frames of reference stuff)... There's a good graph here... <http://hyperphysics.phy-astr.gsu.edu/hbase/force.html#defor> Energy/power/work often confuse me when engaged in casual conversation... o <http://hyperphysics.phy-astr.gsu.edu/hbase/work.html> Work is the result of a force and movement in the direction of that force: o A force of 20 newtons pushing an object 5 meters in the direction of the force does 100 joules of work. Energy is the capacity for doing work: o To do 100 joules of work, you must expend 100 joules of energy. Power is the rate of doing work (or of using energy) o If you do 100 joules of work in one second (using 100 joules of energy), the power is 100 watts. In casual speech, this gets confusing for me, where when I was in graduate school, it was better ingrained, but I lost that advantage decades ago. -- Usenet is so much more valuable, and pleasant, when people share solutions. |
#24
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Strangest Tire Question EVERRR...
Xeno wrote:
> On 4/5/20 3:28 am, Paul in Houston TX wrote: >> wrote: >>> Strangest Tire Question EVERRR... >>> >>> Has anyone ever calculated or estimated the area, in square >>> inches/square cm, of the *surface of the inside* of a tire? >>> >>> Does at least an average exist out there, for broad categories: >>> passenger car, SUV-light truck, and commercial truck? >>> >>> Just curious, Thanks! >> >> Entering footprint into the argument. >> My car's GVW is 3800 lbs so each tire supports 950 lbs (ideally). >> If a my tire has a footprint of 6"x6" = 36" sq, and if each sq in has >> a pressure of 36 psi, then the psi total of the footprint is 1296 lbs. >> Oddly enough my car tire's max load rating is 1295 lbs.Â* Push on it >> with an area and it will push back equally. >> The rest of the tire area is at 36 psi and is irrelevant since it does >> not support anything. > > Lower the tyre pressure and see what happens to the sidewalls. Good point! |
#25
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Strangest Tire Question EVERRR...
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#26
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Strangest Tire Question EVERRR...
On 5/5/20 7:02 am, Arlen Holder wrote:
> In response to what Heron > wrote : > >> Obviously. Not worth discussing with those who mistake >> and interchangeably use the terms force and pressure. >> Don't get them started on energy and power. > > While... o Force = pressure per unit area > > What always confuses me are things like centrifugal versus centripedal > forces (yes, I know, frames of reference stuff)... > There's a good graph here... > <http://hyperphysics.phy-astr.gsu.edu/hbase/force.html#defor> > > Energy/power/work often confuse me when engaged in casual conversation... > o <http://hyperphysics.phy-astr.gsu.edu/hbase/work.html> > > Work is the result of a force and movement in the direction of that force: > o A force of 20 newtons pushing an object 5 meters in the direction of the > force does 100 joules of work. > Energy is the capacity for doing work: > o To do 100 joules of work, you must expend 100 joules of energy. > Power is the rate of doing work (or of using energy) > o If you do 100 joules of work in one second (using 100 joules of energy), > the power is 100 watts. > In casual speech, this gets confusing for me, where when I was in graduate > school, it was better ingrained, but I lost that advantage decades ago. Centrifugal force is a convenient fiction. -- Xeno Nothing astonishes Noddy so much as common sense and plain dealing. (with apologies to Ralph Waldo Emerson) |
#27
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Strangest Tire Question EVERRR...
In response to what Xeno > wrote :
> Centrifugal force is a convenient fiction. Indeed. o At least from one point of view. |
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