Cow tipping the traditional way is not going to happen.
Cows sleep laying down. They doze standing up, which means they are easily roused, and you are not going to sneak up on them.
But let us pretend that they do sleep standing up. Let us look at the physics of it.
http://em-ntserver.unl.edu/Mechanics...%20Tipping.htm
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After taken a counter-clockwise moment about the point A, it is shown that the weight of the cow creates more turning force than the human pushing force. The force of friction is not important here because it's force vector runs through the point A. The normal force can also be left out because before the pushing force is included the normal force of 1400 lbs. is divided in two with equal forces pushing at the center of both legs upward. This means that the cow is balanced. The normal force, though, moves to point A when the pushing force is applied, meaning that this force cancels out. The calculated moment comes out to negative 250 foot pounds, which can also be thought of as 250 foot pounds of force keeping the cows feet pressed against the ground. According to these calculations, it is impossible for an average person to tip an average cow by them self.
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How many people to tip the cow?
Try 2 people
Pushing force = 2 x 300 = 600 lbs
MA
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Since it has already been shown that one person cannot tip a cow by them self, we can figure out just how many people would have to be pushing in order to complete the prank. By adding the second person, the amount of human pushing force is doubled to 600 pounds, still less than the force of friction. When the moment is calculated about A again, we find that there is now a positive 1250 foot pounds of force turning the cow about its feet and therefore tipping the cow on it's side. According to these numbers, cow tipping is possible when two people are in on the prank.
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But wait!
Cows are a prey animal and as such never really sleep soundly, so sneaking up on one without waking them is virtually impossible. Sneaking up on them at a full run is impossible. If it really were that easy to sneak up on them, then they would have been exteinct long before we learned to turn them into a double whopper with cheese.
http://daviswiki.org/Cow_Tipping
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Just because it may be possible to do it, however, doesn't mean it will happen. Cows do not sleep standing up, nor do their knees lock like a horses would. They do however "doze". While traditional parts of the Cow Tipping folklore may not be true, there is anecdotal evidence suggesting that you can actually push a cow over - er, go cow tipping - with a small group of people if you are quiet about it. It physically should be possible if you are fast enough to do so before the cow reacts (requiring more people), or if the cow stands there rigidly and lets you.
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JabberWokky has seen it done in Belle Glade or western Lake Worth in Florida. It also involved a cow that was awake, heavy rope and a pickup truck. It was done by a group of people specifically to prove that it can be done (they did it a few times). The cow went over, got up pissed, and seemed unharmed. Despite the apparent lack of physical harm, it was certainly abuse. Despite the people who insist that there is proof that the "official" way to do it is scientifically impossible (is there an official way to eat an apple or carry a book?), there is an easy way to do it that is actually practiced in rural Florida. It may be touted impossible as a theoretical activity, but empirical evidence trumps even the best math. MichaelGiardina, on the other hand, has a video of former roommates who were less successful. Let's just say the bulls didn't like the idea and chased his friends all about.
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Sorry boys and girls, this is a myth, and nothing more. I spent the better part of my younger years in the corn fields of Iowa and tried on numerous occasions. It just does not happen the way stated for the reasons stated above. We did however train a cow to stand there while we ran at it. It worked, but not in the traditional sense. It also hurt a lot.
http://www.urbandictionary.com/defin...&defid=1204663