Physics at the University of Virginia
Academics People Research Announcements Facilities Adminstration Home Updates

Return to Demo Lab Homepage

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.

Choose a Topic or Enter a keyword to search:
I cannot find what I want!

You have selected the following Demos:
  • None Selected

Choose a subtopic:
(Clicking a green button will add that demo to your list)
 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

Happy and unhappy balls


To demonstrate different coefficients of restitution for different material. Introduce the terms "dead" and "live" balls.


Two balls of similar size have different coefficients of restitutions leading to different bounce responses from different materials. Happy ball (made of high restitution Neoprene) bounces happily off hard surfaces. Unhappy or Sad ball (made of low restitution Norsorex) does not. Then drop an unhappy ball on an inflated plastic bag to demonstrate that "dead' bodies can become "live".