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https:// session.masteringphysics.com/ myct/itemView? assignmentProblemID 52250902&offset; next Signed in as fahad alkaltham Help l Close Copy of Homework assignments for General College Physics I Resources HW Set 6 Problem 7.43 previous l 8 of 10 l next Problem 7.43 Part A A new record for running the stairs of the Empire State If the height gain of each step was 0.20 m, and the mass of the runner was 73 kg what was his average power output during the climb? Building was set on February 3, 2003. The 86 flights, Give your answer in both watts and horsepower with a total of 1576 steps, was run in 9 minutes and 33 Express your answer using two significant figures seconds. Submit My Answers Give Up Part B Express your answer using two significant figures hp Submit My Answers Give Up Continue Provide Feedback

Explanation / Answer

Power P = Energy/time = mgh/t

here h = 1576 * 0.2 = 315 steps

so

Power P = 73* 315* 9.8/(9*60 +33)

P = 393.28 Watts

-----------------------------------------------

1Hp = 746 watts

P = 393.28/746

P = 0.527 Hp

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