{"job_id":"anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e","request_id":"bulk-2026-05-21T09-46-48-791Z-5-a1-physics.09.laws-of-motion.action-reaction-pairs","status":"complete","asset":{"primary_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e/walkthrough.mp4","thumbnail_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e/thumb.jpg","transcript_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e/transcript.vtt","interactive_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e/index.html","scenefile_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e/scene-source.json","duration_seconds":15,"byte_size":469815,"renderer":"html_three_js_local","parameters":{"style":"auto","executor":"native_render_executor","localPath":"/app/storage/assets/anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e","interactivity":"none","renderer_style":"three_js","durationSeconds":15,"render_manifest":{"jobId":"anim-job-0a1c9581-6a4c-461b-a6be-fd081a6ff04e","request":{"gap":{"topic":"laws_of_motion-action_reaction_pairs","severity":"moderate","error_type":"concept_misunderstanding","memory_state":"fragile","display_topic":"Action-Reaction Pairs","common_wrong_answer":"The concept works the same way in all conditions.","confidence_at_error":"high","correct_understanding":"The concept depends on constraints, assumptions, and variable relationships."},"target":{"style":"auto","render":{"fps":30,"format":"mp4","resolution":"1920x1080","include_thumbnail":true,"include_transcript":true},"audience":{"tone":"neutral_instructional","grade":"9","language":"en"},"interactivity":"none","duration_seconds":15},"context":{"chapter":{"name":"Laws of Motion","ncert_class":9},"sub_topics":[{"topic":"laws_of_motion-action_reaction_pairs","key_concepts":["Action-Reaction Pairs","Laws of Motion"]}]},"metadata":{"priority":"normal","trace_id":"bulk-run-2026-05-21T09-46-48-791Z"},"exam_type":"neet","asset_type":"simulation","request_id":"bulk-2026-05-21T09-46-48-791Z-5-a1-physics.09.laws-of-motion.action-reaction-pairs","subject_area":"physics"},"renderer":"html_three_js_local","storyboard":{"beats":[{"label":"Topic","visual":"Show the topic title and the key physical context.","narration":"Action-Reaction Pairs"},{"label":"Mistake","visual":"Show the wrong approach and why it seems plausible.","narration":"The concept works the same way in all conditions."},{"label":"Correction","visual":"Show the right approach step by step.","narration":"The concept depends on constraints, assumptions, and variable relationships."},{"label":"Concept","visual":"Highlight the key formula and the governing relationship.","narration":"Action-Reaction Pairs. Laws of Motion"}],"title":"Action-Reaction Pairs","sceneCode":"<!doctype html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"utf-8\"/>\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"/>\n  <title>Action-Reaction Pairs: Context Matters</title>\n  <style>\n    :root{--bg:#eef2f5;--panel:#ffffff;--line:#cfd8e3;--accent:#3b82f6;--text:#2f3b4a;--muted:#6b7a90;--blue:#3b82f6;--green:#159947;--red:#e76f51;}\n    *{box-sizing:border-box;}\n    body{margin:0;font-family:\"Plus Jakarta Sans\",\"Manrope\",\"Inter\",ui-sans-serif,system-ui,sans-serif;background:var(--bg);color:var(--text);}\n    main{min-height:100vh;display:grid;grid-template-columns:minmax(300px,380px) 1fr;}\n    aside{border-right:1px solid var(--line);background:var(--panel);padding:24px;overflow:auto;max-height:100vh;}\n    section{padding:24px;display:grid;place-items:center;overflow:auto;}\n    h1{margin:0 0 10px;font-size:1.65rem;line-height:1.15;color:#243447;}\n    .sub{margin:0 0 16px;color:var(--muted);font-size:0.95rem;}\n    .formula{margin:0 0 14px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#f7f9fc;color:#243447;font-family:ui-monospace,monospace;font-size:0.85rem;line-height:1.4;}\n    .control{display:grid;gap:6px;margin:12px 0;}\n    .control input{width:100%;accent-color:var(--accent);}\n    .control span{font-size:0.9rem;color:var(--text);}\n    ul{margin:14px 0 0 18px;padding:0;color:var(--muted);display:grid;gap:8px;font-size:0.9rem;line-height:1.5;}\n    li{color:#6b7a90;}\n    .stage{width:min(1000px,95%);aspect-ratio:16/9;border:1px solid var(--line);border-radius:14px;position:relative;overflow:hidden;background:#f6f8fb;box-shadow:0 6px 20px rgba(20,33,61,.08);}\n    .legend{position:absolute;right:12px;top:12px;padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:#ffffff;font-size:0.8rem;color:var(--muted);font-weight:500;}\n    .misconception{padding:10px;margin:12px 0;border-left:3px solid var(--red);background:#fff5f3;border-radius:6px;font-size:0.85rem;color:#c33;}\n    .correction{padding:10px;margin:12px 0;border-left:3px solid var(--green);background:#f0f8f5;border-radius:6px;font-size:0.85rem;color:#159947;}\n    @media(max-width:900px){main{grid-template-columns:1fr;}aside{border-right:0;border-bottom:1px solid var(--line);max-height:none;}}\n  </style>\n</head>\n<body>\n<main>\n  <aside>\n    <h1>Action-Reaction Pairs</h1>\n    <p class=\"sub\">Newton's Third Law: Why context matters</p>\n    <p class=\"formula\">F⃗_A→B = −F⃗_B→A<br/>Always equal, always opposite.<br/>But effect depends on mass & constraints.</p>\n    \n    <label class=\"control\"><span>Mass Ratio (m₁/m₂): <strong id=\"v-mass\">1.0</strong></span><input id=\"c-mass\" type=\"range\" min=\"0.2\" max=\"5.0\" step=\"0.1\" value=\"1.0\"/></label>\n    \n    <label class=\"control\"><span>Constraint Mode:</span>\n      <select id=\"c-mode\" style=\"width:100%;padding:6px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--text);cursor:pointer;\">\n        <option value=\"0\">Free (Both move)</option>\n        <option value=\"1\">Fixed A (Only B moves)</option>\n        <option value=\"2\">Friction (Resistance)</option>\n      </select>\n    </label>\n\n    <div class=\"misconception\">\n      <strong>❌ Misconception:</strong><br/>\n      Action-reaction pairs always look the same. If A pushes B, both accelerate equally.\n    </div>\n\n    <div class=\"correction\">\n      <strong>✓ Correction:</strong><br/>\n      Equal & opposite forces ≠ equal acceleration. F = ma, so if m₁ ≠ m₂, then a₁ ≠ a₂.<br/>\n      Constraints also change what you observe.\n    </div>\n\n    <ul>\n      <li><strong>Free Fall:</strong> Heavy object = smaller a for larger mass</li>\n      <li><strong>Fixed Support:</strong> Support doesn't move despite equal force</li>\n      <li><strong>Friction:</strong> External forces modify apparent motion</li>\n      <li><strong>Key Idea:</strong> Forces are equal. Motion depends on system.</li>\n    </ul>\n  </aside>\n\n  <section>\n    <div class=\"stage\" id=\"stage\">\n      <div class=\"legend\" id=\"legend\">Ready</div>\n      <canvas id=\"sim-cv\" style=\"position:absolute;inset:0;width:100%;height:100%;\"></canvas>\n    </div>\n  </section>\n</main>\n\n<script>\nconst controls = [\n  {\"key\":\"mass\",\"label\":\"Mass Ratio\",\"min\":0.2,\"max\":5.0,\"step\":0.1,\"value\":1.0,\"units\":\"m₁/m₂\"},\n];\n\ndocument.getElementById('c-mass').addEventListener('input',function(){\n  document.getElementById('v-mass').textContent=this.value;\n  window.updateModel?.();\n});\n\n(function(){\n  const cv=document.getElementById('sim-cv');\n  const ctx=cv.getContext('2d');\n  \n  function resize(){\n    const r=cv.getBoundingClientRect();\n    if(r.width>0){\n      cv.width=r.width;\n      cv.height=r.height;\n    }\n  }\n  resize();\n  new ResizeObserver(resize).observe(cv);\n\n  // State variables\n  let state={\n    x1:0.3,v1:0,a1:0,    // Object 1 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dt=Math.min(0.016,(ts-lastTs)/1000);\n    lastTs=ts;\n    const W=cv.width,H=cv.height;\n    const cx=W*0.5,cy=H*0.5;\n    const scale=W*0.8;\n\n    // Read controls\n    state.massRatio=parseFloat(document.getElementById('c-mass').value);\n    state.mode=parseInt(document.getElementById('c-mode').value);\n    state.time+=dt;\n    state.phase=(state.time/15)%4;\n\n    // Apply push force at intervals\n    const pushForce=(Math.sin(state.phase*Math.PI*2)>0.7)?1.5:0;\n    if(pushForce>0){\n      applyForce(dt,pushForce);\n    }else if(Math.abs(state.v1)+Math.abs(state.v2)>0.001){\n      applyForce(dt,0);\n    }\n\n    // Record trails\n    state.trail1.push({x:state.x1,y:0.5});\n    state.trail2.push({x:state.x2,y:0.5});\n    if(state.trail1.length>60)state.trail1.shift();\n    if(state.trail2.length>60)state.trail2.shift();\n\n    // Clear\n    ctx.fillStyle='#f6f8fb';\n    ctx.fillRect(0,0,W,H);\n\n    // Draw ground/track\n    ctx.strokeStyle='#cfd8e3';\n    ctx.lineWidth=1;\n    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