If a 60 kg woman, runs up a flight of stairs having a total rise of 4.0m in a time of 4.2s. what average power did she supply?

 PE = m * g * h 
PE = 60 * 9.8 * 4 
PE = 2352 J 

Power = E/t 

Power = PE/t 
Power = 2352/4.2 
Power = 560 Watt

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