A 2005 study led by Margo Lillie, a doctor of zoology at the University of British Columbia, concluded that tipping a cow would require an exertion of 2,910 newtons (654.2 lbf) of force, and is therefore impossible to accomplish by a single person. Her calculations found that it would take at least two people to apply enough force to push over a cow if the cow did not react and reorient its
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