1M40.41 - Ballistic Pendulum

Code Number:
Demo Title:
Ballistic Pendulum
Potential to Kinetic Energy, Conservation of Momentum
Area of Study:
Ballistic Pendulum.

Make sure this is oiled and swinging freely.  It is also important that this is set level or the ball will not catch in the swinging carriage.

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  • Hans Weltin, "Vertical Ballistic Pendulum Apparatus", AJP, Vol. 31, #9, Sept. 1963, p. 719.
  • William Gurstelle, "How To Build A Ballistics Box That Measures Fastballs", Popular Science, Vol. 287, #3, Sept. 2015, p. 70.
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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.