Module 4

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Northern Virginia Community College *

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Course

201

Subject

Physics

Date

Apr 3, 2024

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docx

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4

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NOL PHY 201 Lab - Simple Pendulum Part 1 Name Michelle Balderrama This assignment is divided into two labs: Part 1 and Part 2. In this part, you will build a pendulum and measure its period of oscillation, reporting the data on a table. Keep all the material because you will use it again in the second part. Save all the files. Before starting, please scroll through the worksheet to check the page numbers and get all the information. Complete all activities before submitting the lab. Each lab counts for 20 points and is about 1.42% of the total grade. Lab Goals This lab will help you learn the following: How to perform an experiment independently How to take measurements, obtain results, and interpret them correctly How to estimate the accuracy of experimental results. Equipment 1. A small object with significant weight for its size (like a washer, nail, ring, bead, coin etc..) and a long string. 2. A measuring tape (or ruler) and a watch. If you don't have a watch, you can use your smartphone to measure the passing time. You can also use your smartphone to take measurements of the length of the string. 3. Scissors, a pencil and a scotch tape. Introduction A simple pendulum consists of an object with negligible size hanging on a string. When the object is deflected from its equilibrium, it swings (oscillates) back and forth. The time for one complete cycle (oscillation) is called the period of oscillation, T . For small angles of deflection, the period of the simple pendulum is given by the following formula: Page 1 of 4
NOL PHY 201 T = 2 π L g , where L is the length of the pendulum and g is the gravitational acceleration. Using simple algebra, the equation can be written as T 2 =( 4 π 2 g ) L . Plotting on a chart T 2 vs. L , with T 2 on the y-axis and L on the x-axis, it is possible to obtain the acceleration of gravity starting from the slope and applying basic algebra. Preliminary Setup: Build a Pendulum 1. Cut a string approximately 90 cm. Tie one end of the string to the bead and the other to the pencil. 2. Tape the pencil onto a table or any other surface, so that the bead is hanging freely. This is your simple pendulum. 3. Take a picture of your set up and upload it on Canvas. Page 2 of 4
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