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Train Lab


            
             Problem- What's the acceleration of the L train?.
            
             Materials- Measure meter, stop watches, L train.
            
             Procedure- First, the person in charge examines the platform briefly. Then he .
             takes 11 people and places that at approximate. equal distances from each other over the .
             entire platform. These are not going to be exactly accurate, as they are just a quickly .
             formed hypothesis of the "equal" distance people people. Once the people are in .
             their positions, they are handed a stopwatch by the safety people and are to remain in .
             these spots until told to do otherwise. The person closest to the "beginning" of the .
             platform (the first place the train passes coming into the station) is given the measure .
             meter. Next, as the train enters the station, all stoppers get ready. As soon as the train .
             starts to move out of the station, all stoppers start their watches and stop their watches .
             when the back of the train passes them. Then, the person with the measure meter .
             measures the distance between each person to get the displacement. With the time and .
             displacement, one can get velocity. Then, we calculate the changes in velocity to find .
             the accelerations and initial V and final V.
             Results/Calculations- Please see attached for calculations.
             Total Displacement: 148.11 m.
             .
             Total Time: 17.90 s.
             .
             Total Velocity: 8.27 m/s.
             .
             Total Acceleration: .46 m/s 2.
             Observations:.
             According to our research, the L train didn't seem to have a very high acceleration.
             .
             Discussion:.
             - Why did we omit certain intervals to make our lab as accurate as possible?.
             - Certain intervals were omitted from this experiment in order to ensure .
             that we were providing the most accurate lab we could. Between some intervals, the .
             numbers for time and/or average velocity were so radically strange that to use them in .
             the lab would only hurt the accuracy of the lab. As well, we had some negative .
             accelerations that implied the train slowed town as it was leaving the station.


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