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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
 Ladder Against a Wall
 Walking the Giant YoYo
 Weight Dependence of Friction
  video  - Contact Area Independence of Friction
 Coefficient of Friction
 Work and Energy
 Rotational Motion
 Properties of Matter

Coefficient of Friction


To show that the coefficient of static friction is greater than the coefficient of kinetic friction.


Place the block on the plane and increase the angle between the plane and the table until the block just begins to slide. Measure this angle (it can be pointed out that the coefficient of static friction is equal to the tangent of this angle). Start again and slowly approach this angle, then give the block a nudge, noting that once it breaks away it accelerates.


  • Friction Block
  • Hinged Inclined Plane
  • Large Protractor