{
  "model": "equal-mass elastic disks, no friction or spin, no rail contact",
  "transformation": "x'=R x+a+u t; t'=t+b",
  "trails": "table-relative",
  "role": "illustration of dynamical symmetry, not derivation of Newton's first law",
  "contact_elapsed": 1.48,
  "end_elapsed": 2.78,
  "minimum_separation": 0.27999999999999997,
  "ball_diameter": 0.28,
  "minimum_rail_clearance": 0.16120000000000012,
  "inverse_transform_error": 4.440892098500626e-16,
  "within_trial_energy_error": 1.1102230246251565e-16,
  "within_trial_momentum_error": 1.1102230246251565e-16,
  "outgoing_velocities": [
    [
      0.43199999999999994,
      -0.576
    ],
    [
      0.768,
      0.576
    ]
  ],
  "fps": 30,
  "duration": 14.0,
  "size": [
    1600,
    960
  ]
}