{
  "annotation_id": "6f85f7fe-8d6f-46aa-b295-10e9feb75830",
  "date_created": "2026-03-02T18:00:46.311000Z",
  "date_modified": "2026-03-02T18:00:46.311000Z",
  "file_hash": "bc4db13d85b877760c5959f669964db9705339577c4ae37c4d135e9179812cd9",
  "private": false,
  "record": {
    "abstract": "Our experiments and molecular dynamics simulations on a projectile\npenetrating a two-dimensional granular medium reveal that the mean deceleration\nof the projectile is constant and proportional to the impact velocity. Thus,\nthe time taken for a projectile to decelerate to a stop is independent of its\nimpact velocity. The simulations show that the probability distribution\nfunction of forces on grains is time-independent during a projectile\u0027s\npenetration of the medium. At all times the force distribution function\ndecreases exponentially for large forces.",
    "arxiv_id": "physics/0312054",
    "authors": [
      "Massimo Pica Ciamarra",
      "Antonio H. Lara",
      "Andrew T. Lee",
      "Daniel I. Goldman",
      "Inna Vishik",
      "Harry L. Swinney"
    ],
    "categories": [
      "physics.flu-dyn"
    ],
    "doi": "10.1103/PhysRevLett.92.194301",
    "title": "Dynamics of drag and force distributions for projectile impact in a   granular medium",
    "url": "https://arxiv.org/abs/physics/0312054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d870d47e-72e9-4073-913d-5771e3123521",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}