1G10.10 - Uniform Acceleration due to Earth's Gravity - Air Track

Code Number:
1G10.10
Demo Title:
Uniform Acceleration due to Earth's Gravity - Air Track
Condition:
Good
Principle:
Gravitational Acceleration is Constant
Area of Study:
Mechanics
Equipment:
Air track with spark generator, Two-pulley system on vertical stand, Weight hangers (5 to 50g), String, Car for air track (260 g), Paper tape for spark generator, Shock Absorber Towers, Rubber Bands.
Procedure:

Pulley alignment is critical to this demonstration.  The lower pulley must be positioned over the center of the track and also at a height that the string connected to the air car and running through the pulleys is parallel to the track.  Depending on the mass of the air car used, the weight hanger may have to be replaced by a 10 or 20 gram mass to overcome friction and show proper results.  When using with a spark generator care must be taken to see that all the insulators are in place.  Caution against electrical shocks should be observed.  The rubber band shock absorber must be used to insure that the string does not bounce off of the pulleys when it hits the end of the tracks.

References:
  • Vincent P. Coletta, Josh Bernardin, Daniel Pascoe, and Anatol Hoemke, "Feeling Newton’s Second Law", TPT, Vol. 57, #2, Feb. 2019, p. 88. 
  • Ole Anton Haugland, "Newton’s Second Law to Go", TPT, Vol. 57, #2, Feb. 2019, p. 86.
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  • Robert J. Sciamanda, "Non-Uniform Acceleration Revisited", TPT, Vol. 29, #5, May 1991, p. 263.
  • J. Richard Mowat, "Mowat Replies", TPT, Vol. 29, #5, May 1991, p. 263.
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  • John S. Zetts, "Constant Deceleration Problems: Rediscovering One Equals Two Minus One", TPT, Vol. 22, #3, Mar. 1984, p. 170.
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