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Fysics before fysics



It was hot. REAL HOT. I just had gym and I realized I had fysics next period...all the way on the third floor. Dun Dun Duuuuuuuuuuun. I knew by the time I got up there I would be dying of exhaustion and be sweating profusely. Its not looking good on this horrendousjourney. As I began to climb,as I expected, I started to sweat more and more. I wondered what terrible thing would cause this to happen to me and then I realized it was all fysics fault. I wanted to figure out how much extra work I am doing by going to third floor instead of the first, so I calculated the amount of work to clib the climb the stair.

To determine this I assumed the stairs have a height of 7 inches. I also remembered my work equations from fysics B. W=∆Et to find ∆Et I must find my change in potential energy, with respect to the first floor. My change of energry from the first floor to the top would be a change in potential energy which is the equation ∆Et=mg∆h. Assuming each step is 7 inches and there was 42 steps the change in height is 294 inches. To convert this to meters I must use the conversion of 1 inch= 0.0245 meters. So (294)(.0245)=7.203 meters. I also have to do a conversion of my weight in pounds to mass in kg. The convertion for this is 1lb=.453592kg. (135)(.453592)=61.22142kg. I then use both of these conversions to plug into the equation ∆Et=mg∆h. ∆Et=(61.22142)(9.8)(7.203), ∆Et=432.15833Jules W=432.15833Jules. That's a lot of work before we do work!

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