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About physicssuperstar

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  1. Today we have marked a time in history! Our mission started with finding gravity... Our lab consisted of dropping a ball from the ceiling and timing how long it took. First we started by measuring the height from floor to ceiling which we found to be 1.73 meters. Then we timed it three times with an average of .46 seconds. We knew to use the equation d=vit+1/2at^2. When subbing in the values, we found gravity to be 8.18 m/s^2 which is pretty close to the actual 9.18m/s^2 actual gravity on earth. Even after this being super close, Fullerton had us do yet another test. This test consisted of using the human vertical test. First we timed how long each person could be in the air and averaged all the group members times which ended up being .617 seconds. Then we did how high a person could jump and it was .3375 meters. When using the equation d=vit+1/2at^2, we found gravity to be 1.77 m/s^2. This value we could just pretty much throw in the trash because we found it to 98% error. So with our gravity experiment, 8.18 m/s^2 is pretty well.
  2. This had such a high percent error mainly because the methods of measuring time and distance aren't good methods to use. The modern experimental setup and methodology would consist of being connected with a form of wireless electronics hooked up to the body and connected to a computer. When jumping the electronics will signal that movement is taking place and will show time in the air as well as the distance jumped. This will be a more better form because it will not rely on us students to be responsible and precise with our measurements.

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