LAB 6

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Portland State University *

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214

Subject

Physics

Date

Apr 3, 2024

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docx

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Uploaded by PresidentViper1964

LAB 6 Fearghus Tyler Physics 214 11/07/2023 Objective: Perform an experiment that uses simple harmonic motion to evaluate g as the acceleration due to gravity. Using a simple pendulum and measuring equipment, Newtons laws will be proven through equations known. Question 1: Forces acting on the pendulum in the lab image include gravity, tension in the string, Question 2:

Question 3: Most certainly gravity is acting as the restoring force as it is trending towards equilibrium. Question 4: When performing the swinging of the pendulum I will mark the ledge I am hanging it from with an angle less than 10 degrees. Question 5: I am utilizing a measuring tape with a possible inaccuracy of +- .1 cm. Due to my eyes. Question 6: Taking into consideration y=mx+b Question 7: Determining gravity from the slope of T^2 versus L and using equation 6.1, we can take the slope found and divide it like so: 4pi^2/slope = g.

Question 8: I got the experimental value as 12.7 using the slope of the best fit line. Question 9: Using the uncertainty value (.25) we can get the smaller value that the slope could take as 2.9. and the largest as 3.4. This can also be applied to g as 11.8 smallest or 13.7 as largest. Question 10: The accepted value of g is less than the range of experimental values. Primary culprits would include the lengths of the wire I used as well as the stopwatch execution. Question 11: After going back over lab 3, I found my values quite a bit closer to the desired values for g. Taking into account practice in doing these labs and better measuring accuracy I could assume these contributed. I would say the pendulum method was a greater method for evaluating g and held more closely guarded contributing data for the final value. Photos of experiment and data: Conclusion: Throughout this experiment I was skeptical of how the values would come out, but I suppose even if it seems rudimentary the experiment trends towards the consistent values provided by Newtonian logic.

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