A person weighing 71 kg, running up the stairs, rises to a height of 11 m for 15 seconds. Determine the power developed in this case.

Given:
m = 71kg
h = 11m
t = 15s
g = 10 N / kg
To find:
N-?
Decision:
N = mgh / t
N = 71 * 10 * 11/15 = 521 W
Answer: N = 521 W.



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