A man with a mass of 70 kg walks up a flight of stairs that is 5 m tall. Another man with a mass of 80 kg walks up the same flight of stairs. Which one has more power?
a) the 70 kg man because he has less mass
b) the 80 kg man because he has more mass
c) the power generated by each is the same
d) power cannot be determined without the time taken to claim the stairs
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