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on those cold, rainy days when you forgetyour rain jacket or umbrella and you want to stay as dry as possible… should you walkand spend more time in the rain? or should you run, which means you'll be smashing intomore raindrops from the side? assuming you haven't been fully soaked yetand you aren't jumping into puddles, the answer is simple. as you move out of the way of onefalling raindrop, you move into the way of

car rental logo vector, another. so the amount of rain hitting thetop of you is constant, regardless of how fast you're going. alternatively, you canpicture that the raindrops themselves are stationary and you (and the earth beneathyou) are moving upwards through the rain! and since the volume of a parallelepiped (that'sa 3d parallelogram) doesn't depend at all

on its slant, then no matter how fast you'removing horizontally the same amount of rain will land on top of you each second. now, if you're not moving, the rain from thetop is all you'll get. but if you are moving, you'll also run into raindrops from the sideand you'll get wetter. so in any given second, you stay driest by standing still, and thefaster you move the wetter you become. but if you're trying to get from point a topoint b, then standing still won't do you much good. and en route from point a to pointb, the total amount of rain you run into from the side has nothing to do with how fast you'regoing - just like how a snowplow will plow the same amount of snow from a stretch ofroad regardless of the exact speed it drives.

in the case of running through the rain, youcan figure that out using parallelepipeds again. so over a given period of time, the same amountof rain will hit you from the top, regardless of how fast you're going. and over a givendistance, you'll hit the same amount of rain from the side - again, regardless of how fastyou're going. so your total wetness is equal to the wetnessper second for rain from the top times the amount of time you spend in the rain, plusthe wetness per meter for rain from the side times the number of meters you travel. so to stay driest getting from one point toanother, you should try to minimize the amount

of water falling onto you from above. andquite simply, that means getting out of the rain as fast as possible.