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
  video  - Center of Mass of Virginia
  video  - Center of Mass Toys
 Stacking Blocks
  video  - Stability Track
  photos  - Tension in a String
 Rope and Three Students
  photos  - Knot in Static Equilibrium
 Force and Tension
 The Roman Arch
 Rotational Equilibrium
  video  - Giant Yo-Yo
 Applications Of Newton's Laws
 Work and Energy
 Rotational Motion
 Properties of Matter

 photos  - Knot in Static Equilibrium


To verify a specific force-tension diagram.


centered image
  1. DEMO PHOTO DOWNLOAD / 4288x2408  

centered image
  3. DEMO PHOTO DOWNLOAD / 4288x2408  

centered image
  4. DEMO PHOTO DOWNLOAD / 4288x2408  

Set up the pulleys, string, and weights as pictured and verify the calculated angles with a large wooden protractor or simple triangle geometry.

From left to right in the above photos:

  • 45 degree weight is 897g
  • Center weight is 1000g
  • 30 degree weight is 732g


  • 1 1000 gm weight
  • Connecting String w/ Loops
  • Large Protractor
  • 2 Pulley
  • 2 Stand
  • 2 Weight Holder
  • 2 Weights