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| | Physics and the Olympics |
 | | Basic mechanics tells us that the highest stresses occur on the outside of a bent beam, and that a symmetrically bent object, such as a pole, actually has a zone down the middle (known as the neutral axis) where the stresses are very low and even zero. |
 | | Energy is stored in the pole as it is bent or strained by the athlete's muscles, and returned to the vaulter as the pole recoils. |
 | | The maximum strain energy of the pole is ms2/2rE, where s is the maximum or "failure" stress on the outside of the pole, r is its density and E is its Young's modulus (i.e. |
| ffden-2.phys.uaf.edu /211_fall2002.web.dir/Daniel_Lenord/vault.html (515 words) |
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