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Analysis of Bouncing Ball Dynamics Using Ultra High-Speed Video at 1200 fps

This study presents an analysis of a racquetball dropped from approximately 3.5 feet, capturing its impact dynamics through high-speed video recorded at 1200 frames per second using a Phantom v4.3 camera. The video was meticulously analyzed frame by frame to track the ball's positions during impact, allowing for the determination of the ball's coefficient of restitution via two independent methods: the Velocity Method (0.8950) and the Ball Deflection Method (0.8693). This comprehensive analysis provides insights into the physics of bouncing balls and their energy loss during impact.

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Analysis of Bouncing Ball Dynamics Using Ultra High-Speed Video at 1200 fps

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Presentation Transcript

  1. Lab#2 Bouncing BallSupplemental Testing Experiments and analysis performed by Mike Krieg

  2. Ultra High Speed Video • High speed video taken using Phantom v4.3 high speed camera • Video filmed at 1200 fps • Racquetball dropped from ~3.5ft

  3. Analysis • Video was analyzed frame by frame to extract racquetball positions throughout impact. • Positions determined for top and bottom of ball (middle taken as average) • 2 independent methods were employed to determine restitution coefficient from position data

  4. Velocity Method According to the velocity method the coefficient of restitution was determined to be 0.8950

  5. Ball Deflection Method Coefficient defined by ratio of reaction impulses during impact Reaction forces approximated using Hooke’s Law According to the deflection method the coefficient of restitution was determined to be 0.8693

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