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Schools in Hefei actively carry out "sunshine sports break" activities, skipping is one of the students' favorite sports, and Li Yang weighs 52kg each.
From the topic: m = 52kg；; H = 4cm = 0.04mt = 1 min = 60s.
w = Gh = mgnh = 52k g× 10N/kg× 180×0.04m = 3744j；
P=Wt=3744J60s=62.4W。
So the answer is: 62.4.
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