This experiment was done outside near a flight of stairs as well as a balcony for three different activities. These activities consisted of walking up a flight of stairs and timing how long it takes to go from the base to the top, running up the stairs and timing how long it takes, and pulling a pulley system supporting a certain mass and how long it takes to lift the mass. (Unfortunately pictures were not take as I had gotten excited to be doing a physical activity and forgotten that I would need to blog this.) Diagrams below give an idea of what the activities consisted of.
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For the stair activity, there were two different activities to be done. The first was to walk up the stairs and the second was to run up the stairs. For both trials, it was established that every step must be taken and the time stops once the last step is reached. For the pulley activity, a 9kg mass was lifted by pulling a rope on a pulley. Below are the results of each activity.
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After the activity was done, the height of one step was measured to be 0.165m. Since there was a total of 26 steps, we found the total height climbed to be 4.29m. Using the vertical distance, masses, and times, we are able to calculate the amount of work done to do each activity.
When calculating work for the stair trials, the equation W=Force*Distance was used. Since my mass in kg is 88.9kg and the distance traveled was 4.29m, the amount of work done to go up the stairs was 3.741kJ. This means that the amount of power used was 309.5 watts when walking and 534.4 watts when running. For the pulley activity, the amount of work done was 378.8J and the amount of power used was 42.2 watts. This makes logical sense as running requires more energy than running and the stair activities used a greater mass than the pulley activity.
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