4B60.18 - Smashing Spheres - 2" Ball Bearings

Code Number:
Demo Title:
Smashing Spheres - 2" Ball Bearings
Mechanical Energy Converted to Heat
Area of Study:
Heat & Fluids
2" ball bearings, tissue paper or regular paper.

Hold paper between the two ball bearings.  When the bearings are smashed together heat is generated at the point of contact and burns a hole in the paper.  Note:  smell of burnt paper will be apparent.

  • James Rohr, Si-Yin Wang, and Vitali F. Nesterenko, "'Ripples' in an Aluminum Pool?", TPT, Vol. 56, #5, May 2018, p. 281.
  • Stephen Brusca, "Heating the Hard Way", TPT, Vol. 28, #4, Apr. 1990, p. 240.

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