Work, Energy and Power HELP (Physics)
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Work, Energy and Power HELP (Physics)

[From: ] [author: ] [Date: 12-02-16] [Hit: ]
Solving for h,=> h = 5.......
A Boy who can generate 500 W runs up a flight of stairs in 5.0 s. How high are the stairs if the boy has a mass of 50 kg?
answer = 5.1m

How do I get this answer?
please show step by step
Much appreciated and thank you in advance
(Will award best answer)

-
Power = 500 Watts
Mass of boy = 50 kg
Time taken by boy = 5.0 sec
Work done due to climbing = mgh = 50 x 9.8 x h [taking height to be h]

Power = Work / Time
=> 500 = (50 x 9.8 x h) / 5
Solving for h,
=> h = 5.1 meter
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