{
  "annotation_id": "9deb5b3f-e5ac-4b20-8110-fe381c7f48cf",
  "date_created": "2026-03-02T18:00:49.584000Z",
  "date_modified": "2026-03-02T18:00:49.584000Z",
  "file_hash": "bc2301b5e8834089f28bbf7a16a8e8cd22f52f139ef204bf3089299738a06393",
  "private": false,
  "record": {
    "abstract": "A simple model is outlined to describe the collision of cast\nphenol-formaldehyde resin spheres such as the balls used in the parlor game of\npocket billiards, based in part on the famous analysis of elastic collisions\ndeveloped by Heinrich Hertz over 100 years ago. The analysis treats the normal\nand tangential components of the initial sphere\u0027s velocity independently as it\ncollides with a stationary identical second sphere. The collective effects of\nthese and other parameters on the trajectory of the second sphere are provided\nin the conclusions.",
    "arxiv_id": "physics/0402008",
    "authors": [
      "S. C. Crown"
    ],
    "categories": [
      "physics.class-ph",
      "physics.pop-ph"
    ],
    "title": "Modeling the Effects of Velocity, Spin, Frictional Coefficient, and   Impact Angle on Deflection Angle in Near-elastic Collisions of Phenolic Resin   Spheres",
    "url": "https://arxiv.org/abs/physics/0402008"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b571c545-03cb-4fea-b4aa-4300da792811",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}