| { | |
| "description": "The task involves a series of suspended small balls arranged in a straight line and closely fitting each other. Then, one ball at one end is lifted and released, colliding with the other balls.", | |
| "prompt": "Static frontal camera view: A Newton’s cradle assembly (five identical 33 g steel balls; coefficient of friction ≈ 0.01, coefficient of restitution ≈ 0.20) rests atop a black perforated optical table. Four balls hang in contact forming a stationary aligned row; the leftmost ball is pulled back to a nearly horizontal position on its individual suspension string and held propped against the tip of an independent lever mounted to a sliding rail. Upon release, the ball swings back to collide with the stationary row. Momentum transfers sequentially through the chain of balls, launching the terminal ball outward into a swing. The collisions are moderately inelastic, which visibly suppresses the ideal Newton’s cradle behavior across successive oscillation cycles.", | |
| "assets": { | |
| "ball-1": { | |
| "model": "../../assets/obj/ball-2.obj", | |
| "material": { | |
| "metal": { | |
| "mass": 0.033, | |
| "density": 7878.1697, | |
| "friction": 0.01, | |
| "restitution": 0.202387 | |
| } | |
| } | |
| }, | |
| "ball-2": { | |
| "model": "../../assets/obj/ball-2.obj", | |
| "material": { | |
| "metal": { | |
| "mass": 0.033, | |
| "density": 7878.1697, | |
| "friction": 0.01, | |
| "restitution": 0.202387 | |
| } | |
| } | |
| }, | |
| "ball-3": { | |
| "model": "../../assets/obj/ball-2.obj", | |
| "material": { | |
| "metal": { | |
| "mass": 0.033, | |
| "density": 7878.1697, | |
| "friction": 0.01, | |
| "restitution": 0.202387 | |
| } | |
| } | |
| }, | |
| "ball-4": { | |
| "model": "../../assets/obj/ball-2.obj", | |
| "material": { | |
| "metal": { | |
| "mass": 0.033, | |
| "density": 7878.1697, | |
| "friction": 0.01, | |
| "restitution": 0.202387 | |
| } | |
| } | |
| }, | |
| "ball-5": { | |
| "model": "../../assets/obj/ball-2.obj", | |
| "material": { | |
| "metal": { | |
| "mass": 0.033, | |
| "density": 7878.1697, | |
| "friction": 0.01, | |
| "restitution": 0.202387 | |
| } | |
| } | |
| } | |
| }, | |
| "tasks": { | |
| "default": { | |
| "assets": ["ball-1", "ball-2", "ball-3", "ball-4", "ball-5"], | |
| "translation": { | |
| "ball-1": [0.448794, 0.377852, 0.178669], | |
| "ball-2": [0.448794, 0.397852, 0.178669], | |
| "ball-3": [0.448794, 0.417852, 0.178669], | |
| "ball-4": [0.448794, 0.437852, 0.178669], | |
| "ball-5": [0.448794, 0.457852, 0.178669] | |
| }, | |
| "orientation": { | |
| "ball-1": [-90, 0, 0], | |
| "ball-2": [0, 0, 0], | |
| "ball-3": [0, 0, 0], | |
| "ball-4": [0, 0, 0], | |
| "ball-5": [0, 0, 0] | |
| }, | |
| "fixed": { | |
| "ball-1": false, | |
| "ball-2": false, | |
| "ball-3": false, | |
| "ball-4": false, | |
| "ball-5": false | |
| }, | |
| "kinematic": { | |
| "ball-1": false, | |
| "ball-2": false, | |
| "ball-3": false, | |
| "ball-4": false, | |
| "ball-5": false | |
| }, | |
| "record": { | |
| "assets": ["ball-5"], | |
| "dim": ["x", "y", "z"], | |
| "fps": 30 | |
| } | |
| } | |
| } | |
| } |