1N21.20 - Air Track - Mass & Momentum Transfer
Set the cars so they are 10-15 cm apart on a level air track. Place the desired number of balls into the projectile launcher. The launcher will hold up to three balls at a time. The balls we have are Al at 10.23 g each, Fe at 28.84 g each, and Pb at 36.67 g each. After you start the timer on the projectile launcher you should still have 5-8 seconds to steady the two cars before the projectile is launched. Both the recoil on the launching car and the momentum transfer to the catching car maybe observed.
- Paul Hewitt, "Answer to April Figuring Physics", TPT, Vol. 53, #5, May 2015, p. 315.
- F. Herrmann and M. Schubart, "Measuring Momentum Without the use of p=mv in a Demonstration Experiment", AJP, Vol. 57, #9, Sep. 1989, p. 858.
- Julius Sumner Miller, Q39 & A39, Millergrams I – Some Enchanting Questions for Enquiring Minds, p. 33 & 89.
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.