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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

Hooke's Law


To demonstrate Hooke's Law of proportionality between a force applied to a spring and its stretched length.


Hang different masses on the spring and measure the length of the spring on the ruler. Demonstrate that z.B. twice the weight results in twice the stretch.
Also a version with two springs available so that one can demonstrate that two springs in series stretch twice as much and two strings in parallel half as much as a single spring for the same weight.


This demo has recently been updated. Various springs can be used. Magnetic arrows are supplied to mark locations of the mass as more or less is added. For the positions shown in the photo, we successively add 50g masses.

Simulations are freely available via the PhET Interactive Simulations website. Try their Mass Spring Lab.