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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
 Angular Displacement
  video  - Spinning Tray
 Centripetal Force
 Spinning Chain
 Centripetal Acceleration
 Rotational Dynamics
  video  - Ballistics Cart
  video  - Shoot and Drop
 Projectile Motion II
  video  - The Monkey and the Hunter
  video  - Range Gun
 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

Projectile Motion II


To show that downward acceleration is independent of horizontal motion.


Place the metal balls on top of each track and make sure they stick to the electric magnets. Both balls are released simultaneously by flipping the switch on the back of the setup. The result is the upper ball striking the lower ball at a point somewhere along the bottom track. Assuming equal initial horizontal motion, the vertical fall of the upper ball does not affect the initial motion.


  • Wooden Projectile Motion Apparatus
  • 6 or 12 V battery