Hiro walks up a flight of stairs in his apartment building. Later in the day, he runs up the same flight of stairs. Which statement about work and power describes Hiro’s actions?
Answer
A
He had more power walking than running.
B
He had more power running than walking.
C
He did more work running than walking.
D
He did more work walking than running.
Explanation
Hiro does about the same work both times because he climbs the same stairs and gains the same height. Power is work divided by time. Since he runs up the stairs in less time than he walks, he has more power running than walking.
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