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OpenStudy (anonymous):
An arrow shot horizontally from a cliff at 15 m/s lands 30 m away. How high is the cliff?
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OpenStudy (fifciol):
it's really the physics question but let me try: |dw:1375873291671:dw| t=d/v h=gt^2/2 \[h=\frac{ g d^2}{2v^2 }\]
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