Several days ago, I went with my fellow homeless to the mall to go shopping. After going to the bathroom, I realized that there were escalators going up and down (I have never noticed this up until now. NEVER). Because I wanted to go up, I naturally decided to run UP the DOWN escalator. However, this caused me to do more work than I would have done if I ran up the up escalator, because of the moving steps. Since work equals force times displacement, running UP the down escalator would increase the distance I have to run, thereby increasing the work I have to do. When I reached the top, I was comparatively more exhausted than my fellow homeless.
also at some point i turned into a duck and all was well:
i was so confused when i saw those ducks run past me that day... can you tell me next time before you start changing into different animals?
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