{ "environment": { "air_resistance": "!=0", "gravity": 9.81 }, "ground": { "label": "Ground", "restitution": 0.5 }, "objects": [ { "height": 0.9, "id": 1, "initial_velocity_v": 0, "name": "PingPongBall", "restitution": 0.71, "size": 0.04, "size_symbol": "d", "static": true }, { "height": 1.3, "id": 2, "initial_velocity_v": 0, "name": "Baseball", "restitution": 0.55, "size": 0.07, "size_symbol": "d", "static": true } ], "render": { "axes_arrow_head_width": 20, "axes_arrow_length": 75, "axes_arrow_width": 8, "fontsize": 20, "margin_axes_range": [ 5, 50 ], "margin_env_range": [ 5, 50 ], "margin_ground_range": [ 5, 50 ], "velocity_arrow_head_width": 30, "velocity_arrow_length": 100, "velocity_arrow_width": 10 }, "task_type": "freefall" }