Materials Needed: Computer, string, objects of different mass, timer (cell phone) MEXS Course Objectives: 1. Introduce t

[answerhappygod]

Materials Needed Computer String Objects Of Different Mass Timer Cell Phone Mexs Course Objectives 1 Introduce T 1 (70.37 KiB) Viewed 12 times

Materials Needed Computer String Objects Of Different Mass Timer Cell Phone Mexs Course Objectives 1 Introduce T 2 (76.01 KiB) Viewed 12 times

Materials Needed: Computer, string, objects of different mass, timer (cell phone) MEXS Course Objectives: 1. Introduce the properties of transverse and longitudinal waves. Pendulums and Simple Harmonic Motion: Activity #1: Today you will be designing your own experiment. You will test the period of a pendulum and how it is affected by changing the mass and then separately by changing the length. Vary each of these variables over at least five different values and measure the resulting period. To get your minds thinking about how to design your experiment, first consider the following statements before beginning the experiment. a. What procedure you will you use to investigate each of the independent variables, i.e. pendulum length and mass b. Predict how you think the independent variable (pendulum length and mass) will affect the dependent variable (Period of the pendulum). c. Be sure to diagram each experiment and illustrate how you changed the independent variables of length and mass. Answer the following questions to guide your experiment preparations. 1. What techniques will you use to obtain a reliable and accurate measurement of the period? Is it best to base your measurement on one period? Five? Thirty? Why? For each of the investigations, answer the following questions (4 & 5): 2. What variable(s) was (were) held constant? Which one(s) was (were) changed? Over what range did you vary the variable(s)? You can use the space below to make notes on these items.
To Begin the experiment, you will need to set up a pendulum in your home. You might follow a plan similar to that outlined below, but each pendulum may be different, depending on how you set it up and what materials you have. a. First, find a location where you can swing a roughly one meter pendulum freely without hurting anyone or damaging anything. b. Once you have your location, you will need to create a "pendulum stand". This could be the back of a chair. A door knob, or any place you could tie a string and have the string swing freely without touching the floor. c. Measure out about 1 meter of string d. Affix one end of the string to the pendulum stand. Tie it to a door knob, tape it to a chair, etc. e. Tie a small ball at the other end of the string, such that it can swing freely still. f. Pull the ball back to about a 20 degree angle and measure the period of the pendulum with a stopwatch or cell phone timer. g. Chane the independent variable and repeat step F above. h. Make a data table and insert it into the lab, listing all values of the dependent and independent variables. i. Repeat the experiment above for the other independent variable. j. When you try different masses, you may not be able to measure mass easily, but you should describe how you estimate the mass. You will need to find household objects that you can easily tie to the string, but will NOT break the string from being too heavy. 3. Based on your data, determine the relationship between the investigated variable and the period of the system. Write a statement in words summarizing the effect (or lack of effect) of the variable on the period. In order to answer this question fully, you will need to graph Period of Pendulum (y axis) vs. Independent Variable (x axis) in a spreadsheet software (Exel, Google Sheets). Include that spreadsheet graph in the box below, along with the description. 4. Repeat # 3 for the other independent variable, and include the graph and description in the space below. 5. Which of the investigated variables had the greatest effect on the period? Is this what you expected? Did any variable(s) have no effect?