{
  "annotation_id": "53836d69-98ac-410c-9b7a-52face8b82ae",
  "date_created": "2026-03-02T18:01:07.836000Z",
  "date_modified": "2026-03-02T18:01:07.836000Z",
  "file_hash": "aa6357ee2db528334b1b1397037fb5119b78408a99537ab2f1a86e9cef5487bc",
  "private": false,
  "record": {
    "abstract": "New measurements are presented of the lift on a spinning baseball. The\nexperiment utilizes a pitching machine to project the baseball horizontally; a\nhigh-speed motion capture system to measure the initial velocity and angular\nvelocity and to track the trajectory over ~5 m of flight; and a ruler to\nmeasure the total distance traversed by the ball. Speeds in the range v=50-110\nmph and spin rates (topspin or backspin)in the range omega=1500-4500 rpm were\nutilized, corresponding to Reynold\u0027s numbers Re=(1.1-2.4) x 10^5 and spin\nparameters R*omega/v=0.1-0.6. Standard least-squares fitting procedures were\nused to extract the initial parameters of the trajectory and to determine the\nlift and drag coefficients. Comparison is made with previous measurements or\nparametrizations of the lift and drag coefficients, and implications for the\neffect of spin on the flight of a long fly ball are discussed.",
    "arxiv_id": "physics/0605041",
    "authors": [
      "Alan M. Nathan",
      "Joe Hopkins",
      "Lance Chong",
      "Hank Kaczmarski"
    ],
    "categories": [
      "physics.pop-ph"
    ],
    "title": "The Effect of Spin on the Flight of a Baseball",
    "url": "https://arxiv.org/abs/physics/0605041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f29feccb-9e42-4546-8e01-a5da2d4d8b72",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}