In physics we measure energy with Joules(J). Calories are likewise a measurement of energy but they are not as precise as the Joule and have thus been superseded by the Joule in the International System of Units. However, nutritional data still uses the calorie for energy measurement of food. According to the formula for Work, W=Fd. Theoretically this means that if I were to run 100m and walk 100m, I would use the same amount of energy to accomplish both tasks. In reality, the work formula isn't as accurate as a 2-D equation. Our bodies actually burn more energy while running. The video below briefly explains why.
- Cawley, Nicholas J.
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