Physics at the University of Virginia
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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
 Push Me Pull Me Carts
 Air Track Reaction Cars
  video  - Newton's Sailboat
 Distortion Loops
 Statics Of Rigid Bodies
 Applications Of Newton's Laws
 Work and Energy
 Rotational Motion
 Properties of Matter

Push Me Pull Me Carts


To demonstrate the Newton's third law of action and re-action.


Two people stand on identical wheel carts and either push on each other or pull. Simplest case involves pulling on the rope and pushing on the stick. A more complex quantitative examples involves two people pushing on each other with grocery scales to actually measure exerted forces or "initiate the force" by throwing a medicine ball to each other.


  • Pasco Wheel Cart
  • Spring Scale