Brain Teasers
Run vs Walk
Since a person uses about the same amount of energy walking for ten kilometers as running for ten kilometers, would a person use more energy running for ten minutes, walking for ten minutes, or is the same amount of energy spent? Why?
Answer
In the first situation, the measurement was distance so the runner would finish much earlier than the person walking; therefore, the amount of energy spent would be approximately the same. In the second situation, the measurement is time, and a person who runs for ten minutes will cover a much greater distance and therefore burn more energy than a person walking for ten minutes.Hide Answer Show Answer
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