## Question

###### Step and explain formula clearly

Every year, there is a foot race to the top of the Empire State Building. The vertical distance traveled (using the stairs!) is about 440 m. The current record forthis race is about 9 min 30 s. If the record holder has a mass of 55 kg, what was his average power output during the race?

## Answers

given mass m=55 kgtime t=9 min 30 sec=570 sheight h=440 mthen the average powerP=mgh/t=55*9.8*440/570 s=

416 W

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