| {"correct_letter": "D", "correct_formula": "(1/2)\u00b7m_1\u00b7v_1i\u00b2 + (1/2)\u00b7m_2\u00b7v_2i\u00b2 = (1/2)\u00b7m_1\u00b7v_1f\u00b2 + (1/2)\u00b7m_2\u00b7v_2f\u00b2", "annotation": "Environment: g=-9.81, F_drag=0.0\nGround: mu_s=0.0, mu_k=0.0\nStainlessSteelCube: a = 2.0, e = 1.0, m = 63200.0, v_0 = 2.4\nGlassCube: a = 2.0, e = 1.0, m = 20000.0, v_0 = 0.6", "choices": ["\u222b F(t) dt = \u0394(mv)", "v_1f = v_1i\u00b7(m_1\u00b2 - m_2\u00b2) / (m_1 + m_2)\u00b2", "\u03bb = h/(m\u00b7v)", "(1/2)\u00b7m_1\u00b7v_1i\u00b2 + (1/2)\u00b7m_2\u00b7v_2i\u00b2 = (1/2)\u00b7m_1\u00b7v_1f\u00b2 + (1/2)\u00b7m_2\u00b7v_2f\u00b2"], "correct_index": 3, "physics_type": "PerfectlyElasticCollision", "seed": "PerfectlyElasticCollision|benchmark/perfectly_elastic_collision/7"} |