{
  "correct_letter": "D",
  "correct_formula": "x(t) = x_0 + v_0·t",
  "annotation": "Environment: g=-9.81, F_drag=0.0\nGround: mu_s=0.0, mu_k=0.0\nDenimCube: a = 3.0, v_0 = (1.0, -1.73, 0.0)\nRoughlyWovenCube: a = 3.0, v_0 = (-2.0, 0.0, 0.0)\nFeltPlainCube: a = 3.0, v_0 = (1.0, 1.73, 0.0)",
  "choices": [
    "T = 2π·√(L/g)",
    "p = m·v_0 · ln(1 + t/τ)",
    "F_push ≤ μ_s·m·g",
    "x(t) = x_0 + v_0·t"
  ],
  "correct_index": 3,
  "physics_type": "UniformLinear",
  "seed": "UniformLinear|benchmark/uniform_linear/6"
}