LAB physics 2

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Houston Community College *

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2125

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Physics

Date

Apr 3, 2024

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docx

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6

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Lab 2: Simple Pendulum Ranim Elldakli PHYS Lab 2125 09/11/2023
Experiment 2: Simple Pendulum Objectives: To determine the value of gravitational acceleration (“g”) of Earth. Equipment: • Ruler / Pencil • Calculator / Computer with graphing software (Excel will do job well) • Small A base (ME-8976) • Track Rod Clamp (ME-9836) • 45cm Steel (ME-8736) • Mass and Hanger Set (ME-8979) • Density set (ME- 8569A) • Small Rod (black) Theory: T ¿ T : Period of Oscitation (time taken for one complete oscitation) L : Length of Pendulum G : Gravitational constant 2 π √ L g
4 π 2 4 π 2 Slope = ( ) => g = ( ) g slope Calculation: Need the graph showing straight line, data, and the equation. Then, slope= ( 4 π 2 ) , and g= ( 4 π 2 ) g slope %Error = ¿ 9.81− your value % ¿ T 2 = ( 4 π 2 g ) . L T 2 L (m) Data and calculation: L (m) 10 T 1 (s) 10 T 2 (s) T= 10 T 1 + 10 T 2 20 (s) T 2 0.4m 12.51 s 12.02 s s 2.453 s 6.017 m 0.35 s 11.81 s 12.61 2.39s s 5.71 m 0.3 s 10.37 10.26s 2.063s 4.255s m 0.25 10.12s 9.82s 1.994s 3.98s
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1. What is the most challenging measurements during data collection and explain why? The most challenging measurements during data collection is collecting accurate and reliable subjective data. It's challenging because it often relies on self-reporting, which can be influenced by various biases and inaccuracies. Subjective data can be highly variable from person to person, making it challenging to draw meaningful conclusions and generalize findings. 2. Why do you include half of the height of the cylinder for the length of the pendulum? half of the height of the cylinder for the length of the pendulum because the effective length of the pendulum is measured from the point of suspension (usually the pivot point) to the center of mass of the pendulum bob. When the pendulum bob is a solid object like a cylinder, its center of mass is typically located at its geometric center. To accurately determine the period of oscillation using the formula for a simple pendulum (T = 2π√(L/g)), you need to measure from the point of suspension to the center of the bob. Measuring from the pivot point to the center of the cylinder, which is half its 0.2m 8.57s 8.66s 1.723s 2.97s 0.15m 7.36s 7.32s 1.468s 2.155s
height, ensures that you account for the true length of the pendulum from which the period is calculated What changes of the period of the pendulum you would expect, if you changed the mass of the pendulum? Changing the mass of the pendulum should not significantly affect the period of the pendulum as long as the length of the pendulum remains constant. The period (T) of a simple pendulum is primarily dependent on the length of the pendulum (L) and the acceleration due to gravity (g), as described by the formula T = 2π√(L/g). The mass of the pendulum bob does not appear in this formula, meaning that altering the mass of the bob while keeping the length constant will not impact the time it takes for the pendulum to complete one full swing (its period). This fundamental principle holds for idealized pendulums, where factors like air resistance and friction are usually negligible for small changes in mass. 3.
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