lab report 5

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Laboratory Report Guidelines (if applicable to the lab)

The following contains information intended to assist you in writing a high quality laboratory report. Note the following general rules:

1) Use passive instead of active voice. Avoid the first person (I, we, us, our, etc.) as well as the second person “you”.

2) Avoid colloquialisms and use proper grammar and spelling in order to avoid having a reader judge the quality of the technical work by that of the written presentation.

3) Read the report several times for continuity and flow. If possible, have an “outsider” read the report to see if it is clear and understandable.

Instructor: Steven Chopski, PhD BME 303 Widener University School of Engineering BME 303: Biomedical Engineering Laboratory I Experiment #2: Force Plates and Data Acquisition Notes: 1. Choose a frequency that you think would be sufficient, and then adjust it as necessary as you move throughout this lab. 2. Data should be exported from DataStudio to a text file (.txt). This file type can be opened in Excel or Matlab and manipulated and graphed. Present all relevant data clearly and concisely. You may want to use averages and standard deviations, and your data may be clearer if you eliminate any excess data points (e.g. when data is being acquired but nothing is happening). 3. Although not completely necessary this often, tare the force plate before each run to ensure comparability (and to remove body weight from the data). 4. You will be sharing your data with your group members, so you must include the data from each group member in your individual lab reports. Experiments: 1. Walking (Repeat the steps a-c with all kinds of foot-ware possible including no footware) a. Create a graph with Normal Force measurements i. Walk at a normal pace, stepping on force plate at some point [3 times per student] ii. Walk at a slightly faster pace [3 times per student] iii. Run [3 times per student] b. Export the data after each student (i.e. one student will perform the experiment 1.a.i. 3 times, then export the data, then the next student…; after all students are done, repeat with experiment 1.a.ii., etc.) c. Discuss the variations in normal and forces as your velocity changes d. Discuss the data among various foot-ware and gender 2. Jumping (Shoes only) a. Create a graph with Normal Force measurements only i. Jump vertically, landing back on the force plate [3 times per student] b. Create a graph with Normal Force measurement i. Jump at approximately a 45 degree angle, landing off of the force plate [3 times per student] ii. Jump as far away from the force plate as you can (long jump), [3 times per student] c. For part 2.a only, determine how to convert the time in the air (hang time) to jump height (Hint: use constant acceleration equations from Dynamics) 1 Instructor: Steven Chopski, PhD BME 303 3. Balance (Shoes Only) a. Create a graph that would allow you to independently measure left and right feet i. Without looking at the screen, tell a group member to stop recording data once you feel you are equally balanced between your left and right side [1 time per student] ii. Do the same, but look at the screen b. Were you more or less balanced while looking at the screen? Why or why not? Determine a way to quantify when you were balanced, and whether or not you remained that way. Discuss your results. 2

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