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Exploring Forces: Punching Bag Acceleration Measurement Project

Delve into the world of biomechanics with this project that aims to measure forces applied to a punching bag using accelerometers. Learn how to create a punching bag that tracks acceleration, calculate maximum force, and compare accelerometer data. This kid-friendly experiment utilizes Wiimotes and iPhones to collect and analyze data, making physics engaging and interactive. Discover the principles behind Newton's Second Law and accelerometer technology while exploring the potential applications of this project in various domains.

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Exploring Forces: Punching Bag Acceleration Measurement Project

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  1. “Hit Me With Your Best Shot” Measuring Forces Applied to a Punching Bag http://www.youtube.com/watch?v=lGI7VmsTle4 Daniel Bergeron, Luke Bosse, Jennifer Farrar, Kristi Harrison, Alex Patel, and Brandon Smith

  2. Overview • Objective • Materials • Methods • Data and Results • Calculations • Data Logger Comparison • “Kid-friendly” lesson • Conclusion

  3. Objectives • Create a punching bag that will measure acceleration using Wiimote accelerometers • Calculate a maximum applied force using acquired data • Compare two different accelerometers

  4. Materials • Wiimote • DarwiinRemote software • iPhone DataLoggerapplication • Duffel bag • Scale

  5. Methods • Set up punching bag • Connect Wiimote to Darwiin program via Bluetooth • Collect data from different test trials • Analyze data in Microsoft Excel to find maximum force • Compare Wiimote data to cell phone accelerometer data

  6. Methods Figure 1: (a) Punching Bag. (b) Hanging set up

  7. Data and Results Figure 2: Acceleration output in each directional axis

  8. Data and Results Resultant Acceleration Figure 3: Max acceleration in the z-axis Figure 4: Resultant Acceleration

  9. Data and Results Figure 5: Max acceleration in z-axis. (a) amax= -4.9 g (b) amax= -4.22 g

  10. Calculations • F=ma Table 1: Values used to calculate max force

  11. Data Logger Comparison Figure 6: Comparison of the data collected from the Wiimote and the iPhone during the same trial

  12. “Kid-friendly” lesson • What is an accelerometer? • Newton’s Second Law • How can a Wiimote be used to measure acceleration? • How does the iPhone data compare to the Wiimote data? • How do we use the graphs?

  13. Summary • We aimed to create a kid-friendly exercise to demonstrate biomechanical principles • Accelerometer data can easily be recorded and analyzed to calculate an applied force

  14. Summary • Our project is a very basic model with potential for numerous other applications of more technical design Figure 7: LoadStar Sensors boxing training technology

  15. Questions?

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