Lab#2 Bouncing Ball Supplemental Testing Experiments and analysis performed by Mike Krieg

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

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

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

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