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Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography


Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

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 Motion In One Dimension
 Motion In Two Dimensions
 Newton's First Law
 Newton's Second Law
 Newton's Third Law
 Statics Of Rigid Bodies
 Applications Of Newton's Laws
 Work and Energy
 Rotational Motion
 Properties of Matter
 Hooke's Law
 Force Constant of a Spring
 Spring Scale Collection
 Strings and Springs
 Breaking Wire (Plasticity)
 Bending Beams
 Prince Rupert's Drops
 Shear Block
 Happy and unhappy balls
  video  - Coefficient of Restitution
 Crystal Models

 video  - Coefficient of Restitution


Measure the bounce height of various sports balls to illustration the effect of materials with different coefficients of restitution.


centered image


Determine the coefficient of restitution of various sports balls by dropping them from the same height and measuring the height to which they bounce back up.

In order of bounce, the balls are:

  • Bouncy Ball (BLACK)
  • Non-Bouncy Ball (BLACK)
  • Ping Pong Ball (WHITE)
  • Racket Ball (BLUE)
  • Tennis Ball (YELLOW)
  • Basketball (ORANGE)
  • Super Ball (PINK)
  • Koosh Ball (Nerf-like GLOW-WHITE)
  • Plastic Bead Balloon Bag (ORANGE)
  • Large Nerf-like Ball (BLUE/ORANGE)
  • Golf Ball (WHITE)
  • Steel Ball Bearing (SILVER)
  • Steel Ball Bearing w/ Plate (SILVER)
  • Soft Baseball (WHITE)
  • Softball (WHITE)
  • Baseball (WHITE)
  • Lacrosse Ball (OFF-WHITE)
  • Field Hockey Ball (RED-ORANGE)