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When it's raining why run instead of walk?
Imagine that you've parked your car in a parking lot. It is 100 feet to the door of the mall. It's raining. Why do people run to the door instead of walk?
It seems to me that quantity of rain drops in a given volume of air (say one cubic foot) is a constant (as long as it doesn't start to "rain harder"). At the extreme ends of the scale (the slow end being walking as slow as a turtle and the fast end being "you move as fast as the Flash and can dodge between the drops) there will be a difference in how wet you get. BUT if the difference in speed amounts to an average walking speed where you take care to avoid the puddles of water versus the speed of the mad dash most people use to run 100 feet from their car, it seems to me that there is no difference in how wet you get. By running you just "run" into more water drops over a shorter time period so you get equally as wet as if you walked. .
Do you agree? Can you use equations to justify your reasoning. This is not homework.
nice try Deflagrated but I live in Colorado. We don't get enough rain in any frequency to bother with umbrellas. Umbrella answers are null and void. You are avoiding answering the question. You just wanted 2 points or to be humorous.
7 Answers
- AntoineBachmannLv 51 decade agoFavorite Answer
You give the good explanation yourself! ;-)
If you assume the quantity of rain drops per unit volume is constant, then the front of your body will hit the same number of drops, irrespective of your speed (forget splashing, not to mention slipping or falling...).
So the only difference will come from how wet the top of your body becomes. And this will be directly proportional to the time you spend under the rain, and inversely proportional to your speed. If you went at instant speed then you would not get the top of your body wet at all, and if you went at zero speed you would get very wet (remember last time you had to wait under the rain?).
It's pretty straightforward to work out once you have the density of rain drops per unit volume. And to get this you need to work from average falling rates for rain (say, 100 fps), and average rainfall rate, say a 25th of an inch per hour, and average drop size. All those factors vary a lot, and you'll need a bit of research.
But the conclusion will not change: all else being equal, it is a good deal to run under the rain, and the faster you run, the better.
Hope this helps
a
- 1 decade ago
this is because many people do not know this piece of information and thier nervous system seem to react to the situation be co-ordnating thier mucle-movement(this is done by the cerebelum of the brain) which results in them running
Source(s): biology books - SHIH TZU SAYSLv 61 decade ago
you are right, we will get wet either way.
Running is our first instinct to stay dry but if the distance is too great, I walk and enjoy the coolness.
- 1 decade ago
I disagree , running is to heat our bodies so that getting wet doesn't affect your body temperature and gotting you a cold ...
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