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?

He did more work running than walking.

He did more work walking than running.

He had more power running than walking.

He had more power walking than running.

Question

Physics

Darrell Morrison

29 June, 23:27

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?

He did more work running than walking.

He did more work walking than running.

He had more power running than walking.

He had more power walking than running.

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Answers (1)

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Salt · Answer 1

The work was the same because he raised his potential energy by the same amount each time. But he had more power while running because power is the measure of how much time it took to do the work. Since he did the same work over a shorter time, it required more power.