{"job_id":"anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa","request_id":"bulk-2026-05-20T10-21-44-856Z-6-physics.09.gravitation.free-fall","status":"complete","asset":{"primary_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa/walkthrough.mp4","thumbnail_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa/thumb.jpg","transcript_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa/transcript.vtt","interactive_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa/index.html","scenefile_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa/scene-source.json","duration_seconds":15,"byte_size":476492,"renderer":"html_three_js_local","parameters":{"style":"auto","executor":"native_render_executor","localPath":"/app/storage/assets/anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa","interactivity":"none","renderer_style":"three_js","durationSeconds":15,"render_manifest":{"jobId":"anim-job-4d130e42-f826-4eab-854e-5cf7f01663fa","request":{"gap":{"topic":"gravitation-free_fall","severity":"moderate","error_type":"concept_misunderstanding","memory_state":"fragile","display_topic":"Free Fall & g","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":"Gravitation","ncert_class":9},"sub_topics":[{"topic":"gravitation-free_fall","key_concepts":["Free Fall & g","Gravitation"]}]},"metadata":{"priority":"normal","trace_id":"bulk-run-2026-05-20T10-21-44-856Z"},"exam_type":"neet","asset_type":"simulation","request_id":"bulk-2026-05-20T10-21-44-856Z-6-physics.09.gravitation.free-fall","subject_area":"physics"},"renderer":"html_three_js_local","storyboard":{"beats":[{"label":"Topic","visual":"Show the topic title and the key physical context.","narration":"Free Fall & g"},{"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":"Free Fall & g. Gravitation"}],"title":"Free Fall & g","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>Free Fall & g: Constraints Matter</title>\n  <style>\n    :root{--bg:#0e121a;--panel:#1c232e;--line:#303449;--accent:#fc884f;--text:#faf9f8;--muted:#9f9ea1;--blue:#627da5;--green:#8decb0;--red:#df8279;}\n    *{box-sizing:border-box;}\n    body{margin:0;font-family:\"Plus Jakarta Sans\",\"Manrope\",\"Inter\",ui-sans-serif,system-ui,sans-serif;background:radial-gradient(120% 90% at 20% -5%,#1c232e 0%,var(--bg) 55%);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:linear-gradient(180deg,rgba(28,35,46,.86),rgba(14,18,26,.94));padding:24px;overflow:auto;backdrop-filter:blur(6px);}\n    section{padding:24px;display:grid;place-items:center;}\n    h1{margin:0 0 10px;font-size:1.65rem;line-height:1.15;}\n    .sub{margin:0 0 16px;color:var(--muted);}\n    .formula{margin:0 0 14px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#11191e;color:var(--accent);font-family:ui-monospace,monospace;font-size:0.9rem;box-shadow:inset 0 0 28px rgba(229,186,103,.08);}\n    .control{display:grid;gap:6px;margin:12px 0;}\n    .control input{width:100%;accent-color:var(--accent);}\n    ul{margin:14px 0 0 18px;padding:0;color:var(--muted);display:grid;gap:6px;}\n    .stage{width:min(1020px,95%);aspect-ratio:16/9;border:1px solid #445862;border-radius:14px;position:relative;overflow:hidden;background:radial-gradient(circle at 50% 38%,#2f4a57,#0f1418 72%);box-shadow:0 18px 60px rgba(0,0,0,.45), inset 0 0 90px rgba(255,255,255,.03);}\n    .stage::before{content:\"\";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 34%);pointer-events:none;}\n    .legend{position:absolute;right:12px;top:12px;padding:8px 10px;border-radius:10px;border:1px solid #465a64;background:rgba(9,14,18,.58);font-size:0.8rem;color:var(--muted);backdrop-filter:blur(4px);}\n    @media(max-width:900px){main{grid-template-columns:1fr;}aside{border-right:0;border-bottom:1px solid var(--line);}}\n  </style>\n</head>\n<body>\n<main>\n  <aside>\n    <h1>Free Fall & g</h1>\n    <p class=\"sub\">Constraints & assumptions change everything</p>\n    <p class=\"formula\">a = g (vacuum only)<br/>a ≠ g (with air)</p>\n    <label class=\"control\"><span>Air Density: <strong id=\"v-airDensity\">0.0</strong> kg/m³</span><input id=\"c-airDensity\" type=\"range\" min=\"0\" max=\"1.2\" step=\"0.1\" value=\"0\"/></label>\n    <label class=\"control\"><span>Object Mass: <strong id=\"v-mass\">1.0</strong> kg</span><input id=\"c-mass\" type=\"range\" min=\"0.1\" max=\"5\" step=\"0.2\" value=\"1\"/></label>\n    <label class=\"control\"><span>Object Radius: <strong id=\"v-radius\">0.1</strong> m</span><input id=\"c-radius\" type=\"range\" min=\"0.05\" max=\"0.3\" step=\"0.05\" value=\"0.1\"/></label>\n    <ul>\n      <li><strong>❌ Misconception:</strong> Free fall always has a = g</li>\n      <li><strong>✓ Reality:</strong> a = g only in a vacuum (no air resistance)</li>\n      <li><strong>🔑 Key:</strong> Air density, shape, mass, size all matter</li>\n      <li><strong>📊 Watch:</strong> Change air density to see acceleration change</li>\n    </ul>\n  </aside>\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<script>\nconst controls = [\n  {\"key\":\"airDensity\",\"label\":\"Air Density\",\"min\":0,\"max\":1.2,\"step\":0.1,\"value\":0,\"units\":\"kg/m³\"},\n  {\"key\":\"mass\",\"label\":\"Object Mass\",\"min\":0.1,\"max\":5,\"step\":0.2,\"value\":1,\"units\":\"kg\"},\n  {\"key\":\"radius\",\"label\":\"Object Radius\",\"min\":0.05,\"max\":0.3,\"step\":0.05,\"value\":0.1,\"units\":\"m\"}\n];\nfor(const c of controls){\n  const inp=document.getElementById('c-'+c.key);\n  const out=document.getElementById('v-'+c.key);\n  inp?.addEventListener('input',()=>{out.textContent=inp.value;window.updateModel?.();});\n}\n(function(){\n  const cv=document.getElementById('sim-cv');\n  const ctx=cv.getContext('2d');\n  function resize(){const r=cv.getBoundingClientRect();if(r.width>0){cv.width=r.width;cv.height=r.height;}}\n  resize();new ResizeObserver(resize).observe(cv);\n  \n  let lastTs=0;\n  \n  // State\n  let y1=30;let vy1=0;let a1=0;\n  let y2=30;let vy2=0;let a2=0;\n  let trailL=[];let trailR=[];\n  \n  const g=9.8;\n  const cdrag=0.47;\n  \n  function glowDot(x,y,r,color,a){\n    const g=ctx.createRadialGradient(x,y,0,x,y,r*2.6);\n    g.addColorStop(0,color.replace('ALPHA',String(a)));\n    g.addColorStop(1,color.replace('ALPHA','0'));\n    ctx.fillStyle=g;ctx.beginPath();ctx.arc(x,y,r*2.6,0,Math.PI*2);ctx.fill();\n  }\n  \n  function trail(points,color){\n    if(points.length<2)return;\n    ctx.strokeStyle=color;ctx.lineWidth=2;ctx.globalAlpha=0.35;\n    ctx.beginPath();ctx.moveTo(points[0].x,points[0].y);\n    for(let i=1;i<points.length;i++)ctx.lineTo(points[i].x,points[i].y);\n    ctx.stroke();ctx.globalAlpha=1;\n  }\n  \n  function arrow(x1,y1,x2,y2,color){\n    const dx=x2-x1,dy=y2-y1,l=Math.sqrt(dx*dx+dy*dy);\n    if(l<2)return;\n    const nx=dx/l,ny=dy/l,s=10;\n    ctx.strokeStyle=color;ctx.lineWidth=2.5;ctx.beginPath();ctx.moveTo(x1,y1);ctx.lineTo(x2,y2);ctx.stroke();\n    ctx.fillStyle=color;ctx.beginPath();ctx.moveTo(x2,y2);\n    ctx.lineTo(x2-s*nx+s*0.4*ny,y2-s*ny-s*0.4*nx);\n    ctx.lineTo(x2-s*nx-s*0.4*ny,y2-s*ny+s*0.4*nx);ctx.fill();\n  }\n  \n  function tick(ts){\n    const dt=Math.min(0.04,(ts-lastTs)/1000);lastTs=ts;\n    const W=cv.width,H=cv.height;\n    \n    // Read sliders\n    const airDensity=Number(document.getElementById('c-airDensity').value);\n    const mass=Number(document.getElementById('c-mass').value);\n    const radius=Number(document.getElementById('c-radius').value);\n    \n    // LEFT: Vacuum (no air)\n    a1=g;\n    vy1+=a1*dt;\n    y1+=vy1*dt;\n    if(y1>H*0.8){y1=30;vy1=0;trailL=[];}\n    trailL.push({x:W*0.25,y:y1});\n    if(trailL.length>100)trailL.shift();\n    \n    // RIGHT: With air drag\n    const area=Math.PI*radius*radius;\n    const dragForce=0.5*airDensity*cdrag*area*vy2*vy2;\n    const weightForce=mass*g;\n    const netForce=weightForce-dragForce;\n    a2=(netForce)/mass;\n    vy2+=a2*dt;\n    y2+=vy2*dt;\n    if(y2>H*0.8){y2=30;vy2=0;trailR=[];}\n    trailR.push({x:W*0.75,y:y2});\n    if(trailR.length>100)trailR.shift();\n    \n    // Clear\n    ctx.clearRect(0,0,W,H);\n    ctx.fillStyle='rgba(48,74,87,0.15)';\n    ctx.fillRect(0,0,W,H);\n    \n    // Ground lines\n    ctx.strokeStyle='#445862';ctx.lineWidth=2;\n    ctx.setLineDash([8,5]);\n    ctx.beginPath();ctx.moveTo(W*0.25,H*0.8);ctx.lineTo(W*0.25,H);ctx.stroke();\n    ctx.beginPath();ctx.moveTo(W*0.75,H*0.8);ctx.lineTo(W*0.75,H);ctx.stroke();\n    ctx.setLineDash([]);\n    \n    // Trails\n    trail(trailL,'#8decb0');\n    trail(trailR,'#df8279');\n    \n    // LEFT: Vacuum\n    ctx.fillStyle='#8decb0';\n    ctx.beginPath();ctx.arc(W*0.25,y1,Math.round(H*0.028),0,Math.PI*2);ctx.fill();\n    glowDot(W*0.25,y1,Math.round(H*0.028),'rgba(141,236,176,ALPHA)',0.5);\n    \n    // LEFT: velocity vector\n    const vscale1=H*0.0012;\n    arrow(W*0.25,y1,W*0.25,y1+vy1*vscale1,'#8decb0');\n    \n    // LEFT: label\n    ctx.fillStyle='#8decb0';ctx.font=Math.round(H*0.045)+'px sans-serif';ctx.textAlign='center';\n    ctx.fillText('VACUUM',W*0.25,H*0.15);\n    ctx.font=Math.round(H*0.035)+'px sans-serif';ctx.fillStyle='#9f9ea1';\n    ctx.fillText('a = '+a1.toFixed(1)+' m/s²',W*0.25,H*0.22);\n    ctx.fillText('ρ = 0',W*0.25,H*0.29);\n    \n    // RIGHT: With air\n    ctx.fillStyle='#df8279';\n    ctx.beginPath();ctx.arc(W*0.75,y2,Math.round(H*0.028),0,Math.PI*2);ctx.fill();\n    glowDot(W*0.75,y2,Math.round(H*0.028),'rgba(223,130,121,ALPHA)',0.5);\n    \n    // RIGHT: velocity vector\n    const vscale2=H*0.0012;\n    arrow(W*0.75,y2,W*0.75,y2+vy2*vscale2,'#df8279');\n    \n    // RIGHT: label\n    ctx.fillStyle='#df8279';ctx.font=Math.round(H*0.045)+'px sans-serif';ctx.textAlign='center';\n    ctx.fillText('WITH AIR',W*0.75,H*0.15);\n    ctx.font=Math.round(H*0.035)+'px sans-serif';ctx.fillStyle='#9f9ea1';\n    ctx.fillText('a = '+a2.toFixed(1)+' m/s²',W*0.75,H*0.22);\n    ctx.fillText('ρ = '+airDensity.toFixed(1),W*0.75,H*0.29);\n    \n    // Drag force indicator (right side only, when vy2>0)\n    if(vy2>2 && airDensity>0){\n      ctx.strokeStyle='#fc884f';ctx.lineWidth=2.5;\n      const dragVis=Math.min(dragForce*0.15,40);\n      ctx.beginPath();ctx.moveTo(W*0.75,y2);ctx.lineTo(W*0.75,y2-dragVis);ctx.stroke();\n      ctx.fillStyle='#fc884f';ctx.font=Math.round(H*0.03)+'px sans-serif';ctx.textAlign='center';\n      ctx.fillText('drag',W*0.75,y2-dragVis-8);\n    }\n    \n    // Center divider\n    ctx.strokeStyle='#445862';ctx.lineWidth=1;ctx.setLineDash([4,4]);\n    ctx.beginPath();ctx.moveTo(W*0.5,H*0.05);ctx.lineTo(W*0.5,H*0.85);ctx.stroke();\n    ctx.setLineDash([]);\n    \n    // Title\n    ctx.fillStyle='var(--text)';ctx.font=Math.round(H*0.05)+'px sans-serif';ctx.textAlign='center';\n    ctx.fillText('Free Fall: Constraints Change Acceleration',W*0.5,H*0.045);\n    \n    // Legend info\n    const legend='Vacuum: a=g | Air: a<g (drag reduces)';\n    document.getElementById('legend').textContent=legend;\n    \n    requestAnimationFrame(tick);\n  }\n  requestAnimationFrame(tick);\n  window.updateModel=function(){\n    y1=30;vy1=0;\n    y2=30;vy2=0;\n    trailL=[];\n    trailR=[];\n  };\n})();\n</script>\n</body>\n</html>","remediationGoal":"Close concept_misunderstanding for physics."},"rendererStyle":"three_js"}}},"metadata":{"rendered_at":"2026-05-20T10:49:06.510Z","cache_hit":false,"cost_usd":0},"error":null}