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.