Pendu

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University of Texas, Rio Grande Valley *

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123

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Physics

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Apr 3, 2024

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docx

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5

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Pendulum Lab- Names: Kaory Montano, Jazmine Carrizales, Aida Mireles Date: In this lab you will test different variables of the pendulum to see how they affect time of swing (period). You need to know that the time it takes a pendulum to swing to the opposite side and back to its original starting position is called the period. The variables you will be testing are length of string, mass of pendulum, and angle of release. Today you will just be using inquiry to figure out the relationships between the variables being tested. Big Questions: 1. How do you think changing the amount of mass hanging on the end of the pendulum will affect the period of the pendulum? 2. How do you think changing the length of the string for the pendulum will affect the period of the pendulum? 3. How do you think changing the angle of release will affect the period of the pendulum? Hypothesis: (Write hypotheses for the questions posed above) 1. If the amount of mass hanging on the end of the pendulum, then it will 2. If the length of the string varies then the pendulum will decrease. 3. If the angle of release is modified, nothing will happen. Procedures: Manipulate the pendulum. The 3 things you need to change today are: 1. Amount of mass hanging on the string 2. Changing the length of string 3. Changing the angle of release By the end, you should be able to figure out the relationship between the period and the variable tested. Results: (circle one) 1. As the amount of mass hanging from the pendulum increases, then the period (increases, decreases, or stays the same). 2. As the length of string increases then the period (increases, decreases, or stays the same). 3. As the angle of release increases then the period (increases, decreases, or stays the same). Pendulum Lab Names: © Science Lessons That Rock
Date: Big Questions: 1. How do you think changing the amount of mass hanging on the end of the pendulum will affect the period of the pendulum? 2. How do you think changing the length of the string for the pendulum will affect the period of the pendulum? 3. How do you think changing the angle of release will affect the period of the pendulum? Materials Needed: Phet Simulation: https://phet.colorado.edu/sims/html/pendulum-lab/latest/pendulum- lab_en.html Procedures/Methods Click on Lab Part 1: Changing the amount of mass a. Leaving the length of the string at 0.70 m, change the mass quantity on the pendulum and record the mass on your data table. b. Click Period Timer. c. Release from an angle of 40 degrees. d. Record the period time e. Repeat the trial once more. f. Repeat steps a to d for different masses, recording your data on the data table. g. Take the average of the data. Part 2: Changing the length a. Leaving the mass at 1.00 kg, change the length of the string quantity on the pendulum and record the length you are testing on your data table. b. Click Period Timer. c. Release from an angle of 40 degrees. d. Record the period time. e. Repeat the trial once more. f. Repeat steps a to d for different string lengths, recording your data on the data table. g. Take the average of the data. Part 3: Changing the angle of release a. Set the length of the string to 0.70 m and mass at 1 kg. b. Test different angles of release and record the angle and periods on the data table, conducting two trials for each angle. c. Calculate the average. Data: Part 1 - Changing the mass (Remember to time for 5 periods) © Science Lessons That Rock
Amount of Mass Trial 1(sec) Trial 2(sec) Average (sec) .50 kg 1.7310 s 1.7310 s 1.7310 s 0.80 kg 1.7310 s 1.7310 s 1.7310 s 1.10 kg 1.7310 s 1.7310 s 1.7310 s 1.20 kg 1.7310 s 1.7310 s 1.7310 s 1.30 kg 1.7310 s 1.7310 s 1.7310 s Part 2- Changing the length (Remember to time for 5 periods) Length of String Trial 1(sec) Trial 2(sec) Average (sec) 0.30 m 1.1332s 1.1332s 1.1332s 0.50 m 1.4630 s 1.4630 s 1.4630 s 0.60 m 1.6026 s 1.6026 s 1.6026 s 0.80 m 1.8505 s 1.8505 s 1.8505 s 0.90 m 1.9628 s 1.9628 s 1.9628 s Part 3– Changing the angle (Remember to time for 5 periods) Angle of Release Trial 1(sec) Trial 2(sec) Average (sec) 25 ° 1.6986 s 1.6986 s 1.6986 s 35° 1.7184 s 1.7184 s 1.7184 s 45° 1.7455 s 1.7455 s 1.7455 s 50° 1.7620 s 1.7620 s 1.7620 s 55 ° 1.7805 s 1.7805 s 1.7805 s Results: ( One sentence- what happened?) © Science Lessons That Rock
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Part 1 : What is the relationship between the mass and the period? There is no correlation relationship between changing the mass since it has no effect on the period. Part 2: What is the relationship between the length of string and the period? There is direct correlation between the length of the string As the length of the string increases our results for the period increases as well. Part 3: What is the relationship between the angle of release and the period? The result of the seconds increased due to increasing the angle of the pendulum. (correlation direct up up) Conclusions: ( Why did you get those results? What did you learn? Were your hypotheses correct? Did you make any errors? Use complete sentences!) For the first question regarding the change of mass and if the period of the pendulum will be affected, we put that it would increase. In the final results is showed that the period stayed the same even if the mass changes. For the second question asking if the length change would affect the period we put that it would decrease. The result showed that the period increases causing direct correlations. For the last question the angle change did increase the period time also causing a direct correction and proving our hypothesis to be incorrect. Additionally, we learned that even though you have several trials you will end up with the same result. Pendulum Lab CER GUIDING QUESTION (What question are you trying to answer?) Which factor(s): mass, string length, or angle of release, affect the period of a pendulum swing? © Science Lessons That Rock
OUR CLAIM (Provide an answer to the guiding question) EVIDENCE (Prove your claim) When we change the length of the string our data showed direct correlation. For example, when our length was 0.50 m our period was 1.4630 seconds and we increase our length to 0.60m the period was 1.6026 seconds REASONING (Justify your evidence and how it supports your claim) Through the questions we will show the meaning of no correlation, direct correlation and inverse correlation. Showing the table with the different results of mass, length and angle will provide a better understanding. Like we mentioned © Science Lessons That Rock