how wet r u ?

[JPC]

now then.....does anyone know if u get wetter running or walking ..assuming rain uniformity and same distance covered

 

[WoodYouLike]

wet is wet, isn't?
and if you dont' like it: STAY in side!

 

[Richardp]

definitely drier to run cos you'll get indoors before the rain that would have got to you if you walked hasn't landed on you yet, but it goes against the prime directive as it could affect the Space Time Continuum.

 

[Richardp]

Ah! but hang on, you'll have crashed into the rain that you would,nt have reached cos you was moving to slow which brings us back to the prime directive

 

[felix]

No matter what your speed is you will be hit by all the rain drops in a volume or air equal to your frontal area multiplied by the distance travelled. You will also be hit by all the drops in a volume equal to your 'plan' area multiplied by the vertical speed of the rain multiplied by the time you're out in it.

You can't do anything about the frontal soaking but you can minimize the overhead contribution by running as fast as you can - or you can use an umbrella!

 

[andy]

No matter what your speed is you will be hit by all the rain drops in a volume or air equal to your frontal area multiplied by the distance travelled. You will also be hit by all the drops in a volume equal to your 'plan' area multiplied by the vertical speed of the rain multiplied by the time you're out in it.

You can't do anything about the frontal soaking but you can minimize the overhead contribution by running as fast as you can - or you can use an umbrella!

if the wind is blowing the same direction as you, and you run then you shouldnt get as wet as if you were running into the wind/rain

 

[JPC]

when u sit in ur car and its raining u get x amount of rain on it....
but if u then pull off its more and wipers have to come on...
so could that be the answer ?

 

[WoodYouLike]

Running with the wind:

Your back would get wetter, your front less wet = average wet.

Wet = Wet

 

[Moz]

JPC

Youre not Roy from "Corrie St " are you ?

Joking aside I have thought this when doing sheet metal weathing /lead work on roofs ,an fixing bosses on soil pipes ,sat there ..or up a ladder wondering wether (sic) it be better to be rushed ,an leave it til fine or as I mostly do, weather the job an complete next sunny/fine day ...
what I want to know am I more inclined to be wetter up at height ,or ground level filling the van up to knock off for the day ...
or is it "Swings an Roundabouts"??

 

[jasy]

skin is waterproof whats the problem!

 

[Richardp]

skin is waterproof whats the problem!

well that could have put a dampner on the thread but here's something that throws cold water over your theory.

"Q) Is human skin waterproof and breathable?
Mike Callaghan, Toronto, Ontario

A) IN OTHER WORDS, is your skin like a naturally occurring Gore-Tex jacket? The answer, according to Dr. Robert Polisky, a dermatologist in Elk Grove Village, Illinois, is both yes and no. Skin, which protects the body against injury, microorganisms, and chemical agents, is water-resistant but not waterproof. The protective layer is called the stratum corneum, a thin membrane of mostly dead cells that's rich in a protein called keratin and also coated with sebum, an oil secreted through hair follicles. Together they create a water-resistant barrier that protects the dermis, where the capillaries and sweat glands lie. (If you want to verify that your skin isn't waterproof, take a long bath—the prunelike effect on your hands and feet is a result of the keratin becoming waterlogged.) So does your skin breathe? Not in a strict sense: Your pores don't inhale or exhale. But they do allow harmful metabolic wastes like salt and urea to escape the body when it heats up. Thus, the skin, which weighs an average of 6.5 pounds, may be heavier than a high-performance jacket, but it has at least one distinct advantage: You never need to take it to the dry cleaner."

 

[JPC]

thx ....thats helped

 

[Thermo]

have you nothing better to occupy your time with??????
i really do worry about all of you!!

 

[AdamW]

You can't do anything about the frontal soaking but you can minimize the overhead contribution by running as fast as you can - or you can use an umbrella!

Not true if you are using an umbrella though!

If you take the walker/runner as your rest frame, then the raindrops follow an air-resistance-limited ballistic trajectory towards the walker. Due to the air resistance, this would effectively be a straight line. However, the angle between this straight line and the ground would vary depending on walking speed, where at a walking speed of zero this angle is 90 degrees, and at a walking speed of infinity this angle is zero degrees.

We will assume:
1) a distance of 1.8m between the tip of the umbrella and the ground
2) umbrella is square, with two sides perpendicular to the direction of travel and two sides parallel, and each side is 1.2m long.
3) rain is falling vertically with a velocity of 5 ms^-1 (apparently 2-9ms^-1 is typical, so let's pick an arbitrary value)
4) the umbrella remains straight and level
5) the walker is infinitely thin, perfectly upright and resides entirely under the centre point of the umbrella

Now, falling at 5ms^-1, it will take 1.8/5 seconds for the raindrop to travel from the umbrella edge to the ground, 0.36s.

Now, in order to traverse the 0.6m horizontal displacement from umbrella edge to the feet, in 0.36s, the walker speed would have to be 0.6/0.36 = 1.7ms^-1.

So, our hypothetical rod can travel at up to 3.7mph before getting it's feet wet. Any faster and the rain will get him.

 

[Thermo]

nope you dont then!