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OpenStudy (anonymous):
A 48 kg pole-vaulter running at 11.5m/s vaults over the bar. His speed when he is directly over the bar is 1.5m/s. Neglect air resistance, as well as any energy absorbed by the pole, and KEinitial + PEinitial + Wext= KEfinal + PEfinal
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OpenStudy (anonymous):
\[KE _{i} + PE _{i}+W _{ext}=KE _{f}+PE _{f}\]
OpenStudy (anonymous):
|dw:1354269432649:dw|
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