Lab #2
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Physics
Date
May 15, 2024
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Uploaded by ColonelSnailPerson237
Name: Yasmin Benzriouil
Lab Partners: Sakhna Mainouna Diatta, Andrew Page, Jonathan Mahadeo, Greg Laghiti
Title: Gravitational Acceleration Objective of Experiment: the goal of this experiment is to measure g, the gravitational acceleration near the surface of the Earth and to compare it with the known value g = 9.81 m/ s2.
Procedure: Cut a paper tape, about 1.5 m long. Attach the weight to one end of the tape using an alligator clip. Pass the other end of the tape underneath the black carbon paper of the spark machine and hold it steady. Turn on the sparker and release the weight. Turn o
n the sparker after the weight hits the floor. Make sure the tape leaves the sparker before it hits the floor. If you set the sparker frequency to 40 Hz then the time difference between two adjacent points is 1/40 s. For example, let the time at y 0 be t = 0 s. Then the time at y1 is 1/40 s, the time at y2 is 2/40 s, ···, the time at y14 is 14/40 s and so on.
Theory of underlying Physics: That gravitational physics can stay the same when air resistance is
negatable. (Free fall)
Experimental Data
Y0-Y1= 10cm
=0.1m
V1= 4.4m/s
Y1-Y2= 12cm
=0.12m
V2= 4.7m/s
Y2-Y3= 11.5cm
=0.115m
V3= 4.5m/s
Y3-Y4= 11cm
=0.11m
V4= 4.28m/s
Y4-Y5= 10.4cm
=0.104m
V5=3.98m/s
Y5-Y6=9.5cm
=0.095m
V6=3.7m/s
Y6=Y7=9cm
=0.09m
V7=3.5m/s
Y7-Y8=8.5cm
=0.085m
Y8-Y9=8cm
=0.08m
Y9-Y10=7.4cm
=0.74m
Y10-Y11=6.7cm
=0.067m
Y11-Y12=6.2cm
=0.062m
Y12-Y13=5.5cm
=0.055m
Y13-Y12=5cm
=0.05m
Y12-Y13=4.3cm
=0.043m
0.03
0.05
0.08
0.10
0.13
0.15
0.18
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
Velocity
Y2-Y1/X2-X1 =-9.2cm/s^2
(-9.2-9.81)/9.81*100
6%
Calculation and Error Analysis/ Conclusions and Sources of Error
In comparison to the expected outcome, our results showed a significant decrease. This discrepancy could be attributed to our handling of the line paper, potentially inducing friction by applying force upon release. Most likely this was the case with our lab and eventually the numbers began to decrease in a linear form as shown on the graph instead of increase in a linear form which is the proper behavior for this lab. The observed error deviates from our anticipated outcome, considering our knowledge of the gravitational force as 9.8 m/s². We had assumed our calculations would closely approximate this value; however, our obtained result different greatly as it was in the negatives due to the measurements of the intervals measured during the experiment slowly decreasing each interval instead of increasing this once again was most likely due to human error when making the dot and conducting the overall lab.
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