As a pole vaulter runs toward the bar, he accumulates kinetic energy. When he plants his vaulting pole in the ground, he trades his kinetic energy for potential energy. However even a pole vaulter with good technique will lose some energy in the process. As the pole bends, his kinetic energy is transferred to the vaulting pole. Then he uses the potential energy to lift himself over the bar. The potential energy is depleted once he lands.
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