{"job_id":"anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4","request_id":"bulk-2026-05-20T12-50-22-156Z-4-physics.09.laws-of-motion.newton-second-law-fma","status":"complete","asset":{"primary_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4/walkthrough.mp4","thumbnail_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4/thumb.jpg","transcript_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4/transcript.vtt","interactive_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4/index.html","scenefile_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4/scene-source.json","duration_seconds":15,"byte_size":499528,"renderer":"html_three_js_local","parameters":{"style":"auto","executor":"native_render_executor","localPath":"/app/storage/assets/anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4","control_count":2,"interactivity":"none","simulation_id":"physics.09.laws_of_motion.newton_second_law_fma","renderer_style":"three_js","durationSeconds":15,"render_manifest":{"jobId":"anim-job-34d6e453-6a89-490a-8bd6-bd26cd19c8f4","request":{"gap":{"topic":"newton-second-law","severity":"moderate","error_type":"wrong_assumption","memory_state":"fragile","display_topic":"Newton's Second Law (F = ma)","common_wrong_answer":"Heavier objects accelerate faster for the same force.","confidence_at_error":"high","correct_understanding":"Acceleration is proportional to net force and inversely proportional to mass: a = F/m. Mass and acceleration are independent of each other."},"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":"newton-second-law","key_concepts":["F = ma","acceleration","force","mass"]}]},"metadata":{"priority":"normal","trace_id":"bulk-run-2026-05-20T12-50-22-156Z"},"exam_type":"neet","asset_type":"simulation","request_id":"bulk-2026-05-20T12-50-22-156Z-4-physics.09.laws-of-motion.newton-second-law-fma","subject_area":"physics"},"renderer":"html_three_js_local","storyboard":{"beats":[{"label":"Topic","visual":"Show the topic title and the key physical context.","narration":"Newton's Second Law (F = ma)"},{"label":"Mistake","visual":"Show the wrong approach and why it seems plausible.","narration":"Heavier objects accelerate faster for the same force."},{"label":"Correction","visual":"Show the right approach step by step.","narration":"Acceleration is proportional to net force and inversely proportional to mass: a = F/m. Mass and acceleration are independent of each other."},{"label":"Concept","visual":"Highlight the key formula and the governing relationship.","narration":"F = ma. acceleration. force"}],"title":"Newton's Second Law (F = ma)","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>Newton's Second Law: F=ma Misconception</title>\n  <style>\n    :root{--bg:#101417;--panel:#1c232e;--line:#3b4a55;--accent:#e0b15b;--text:#f3f7fa;--muted:#a8b4bf;--blue:#4ea8ff;--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%,#2a3944 0%,var(--bg) 58%);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:#162029;color:var(--accent);font-family:ui-monospace,monospace;font-size:0.9rem;box-shadow:inset 0 0 28px rgba(224,177,91,.14);}\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 #4b6170;border-radius:14px;position:relative;overflow:hidden;background:radial-gradient(circle at 50% 38%,#3f6272,#141b22 72%);box-shadow:0 18px 60px rgba(0,0,0,.42), inset 0 0 90px rgba(255,255,255,.05);}\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    .icon-box{display:inline-block;width:18px;height:18px;border-radius:3px;margin-right:6px;vertical-align:middle;}\n    .icon-wrong{background:var(--red);}\n    .icon-right{background:var(--green);}\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>Newton's 2nd Law</h1>\n    <p class=\"sub\">Why Heavier Doesn't Mean Faster</p>\n    <p class=\"formula\">a = F / m</p>\n    <label class=\"control\"><span>Applied Force: <strong id=\"v-force\">10</strong> N</span><input id=\"c-force\" type=\"range\" min=\"5\" max=\"20\" step=\"1\" value=\"10\"/></label>\n    <label class=\"control\"><span>Time Scale: <strong id=\"v-scale\">1</strong>×</span><input id=\"c-scale\" type=\"range\" min=\"0.5\" max=\"2\" step=\"0.1\" value=\"1\"/></label>\n    <ul>\n      <li><span class=\"icon-box icon-wrong\"></span><strong>Misconception:</strong> Heavier = faster</li>\n      <li><span class=\"icon-box icon-right\"></span><strong>Truth:</strong> Same force → same a</li>\n      <li>Acceleration depends on F and m</li>\n      <li>Watch both objects—they move together</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 = [{\"key\":\"force\",\"label\":\"Applied Force\",\"min\":5,\"max\":20,\"step\":1,\"value\":10,\"units\":\"N\"},{\"key\":\"scale\",\"label\":\"Time Scale\",\"min\":0.5,\"max\":2,\"step\":0.1,\"value\":1,\"units\":\"×\"}];\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  let lastTs=0;\n\n  // State variables\n  let state={\n    time:0,\n    light_x:0, light_v:0, light_a:0,\n    heavy_x:0, heavy_v:0, heavy_a:0,\n    light_trail:[],\n    heavy_trail:[]\n  };\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=1.5;ctx.globalAlpha=0.4;\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,width){\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=8;\n    ctx.strokeStyle=color;ctx.lineWidth=width||2;\n    ctx.beginPath();ctx.moveTo(x1,y1);ctx.lineTo(x2,y2);ctx.stroke();\n    ctx.fillStyle=color;ctx.beginPath();\n    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);\n    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 slider values\n    const F=Number(document.getElementById('c-force').value);\n    const timeScale=Number(document.getElementById('c-scale').value);\n    \n    // Physics parameters\n    const m_light=1;\n    const m_heavy=3;\n\n    // Update state\n    state.time+=dt*timeScale;\n\n    // Acceleration (same force, different masses → different accelerations in naive view)\n    // But we show BOTH paths: what students think vs. what really happens\n    // For this remediation: we show that with SAME force applied, \n    // we need to show the comparison properly.\n    \n    // Light object (m=1 kg): a = F/m = F/1 = F\n    // Heavy object (m=3 kg): a = F/m = F/3\n    state.light_a=F/m_light;\n    state.heavy_a=F/m_heavy;\n\n    // Integrate velocity and position\n    state.light_v+=state.light_a*dt*timeScale;\n    state.light_x+=state.light_v*dt*timeScale;\n    \n    state.heavy_v+=state.heavy_a*dt*timeScale;\n    state.heavy_x+=state.heavy_v*dt*timeScale;\n\n    // Trail tracking\n    const trail_step=0.08;\n    if(state.time%trail_step<dt*timeScale){\n      state.light_trail.push({x:state.light_x,y:0});\n      state.heavy_trail.push({x:state.heavy_x,y:0});\n      if(state.light_trail.length>180)state.light_trail.shift();\n      if(state.heavy_trail.length>180)state.heavy_trail.shift();\n    }\n\n    // Clear canvas\n    ctx.clearRect(0,0,W,H);\n\n    // Draw background grid\n    ctx.strokeStyle='rgba(59,74,85,0.2)';ctx.lineWidth=1;\n    for(let i=0;i<W;i+=60){\n      ctx.beginPath();ctx.moveTo(i,0);ctx.lineTo(i,H);ctx.stroke();\n    }\n\n    // Draw ground line\n    const ground_y=H*0.65;\n    ctx.strokeStyle='#4b6170';ctx.lineWidth=2;\n    ctx.beginPath();ctx.moveTo(0,ground_y);ctx.lineTo(W,ground_y);ctx.stroke();\n\n    // Initial positions\n    const x0=W*0.15;\n    const y_light=ground_y-40;\n    const y_heavy=ground_y-40;\n    const scale_px=2.5;\n\n    // Current positions\n    const light_pos_x=x0+state.light_x*scale_px;\n    const heavy_pos_x=x0+state.heavy_x*scale_px;\n\n    // Draw force indicators (at start)\n    const force_h=30;\n    ctx.strokeStyle=var(--blue);ctx.lineWidth=3;\n    // Light object force arrow\n    arrow(light_pos_x-F*2.5,y_light,light_pos_x,y_light,'#4ea8ff',3);\n    ctx.fillStyle='rgba(78,168,255,0.1)';ctx.font=Math.round(H*0.032)+'px sans-serif';\n    ctx.fillText('F='+F+'N',light_pos_x-20,y_light-45);\n\n    // Heavy object force arrow\n    arrow(heavy_pos_x-F*2.5,y_heavy,heavy_pos_x,y_heavy,'#4ea8ff',3);\n    ctx.fillText('F='+F+'N',heavy_pos_x-20,y_heavy-45);\n\n    // Draw trails\n    if(state.light_trail.length>1){\n      trail(state.light_trail.map(p=>({x:x0+p.x*scale_px,y:y_light})),'rgba(141,236,176,0.6)');\n    }\n    if(state.heavy_trail.length>1){\n      trail(state.heavy_trail.map(p=>({x:x0+p.x*scale_px,y:y_heavy})),'rgba(223,130,121,0.6)');\n    }\n\n    // Draw objects\n    // Light object\n    const r_light=16;\n    ctx.fillStyle='#8decb0';ctx.beginPath();ctx.arc(light_pos_x,y_light,r_light,0,Math.PI*2);ctx.fill();\n    glowDot(light_pos_x,y_light,r_light,'rgba(141,236,176,ALPHA)',0.4);\n    ctx.fillStyle='#0a0e12';ctx.font='bold '+Math.round(H*0.028)+'px sans-serif';ctx.textAlign='center';ctx.textBaseline='middle';\n    ctx.fillText('1 kg',light_pos_x,y_light);\n\n    // Heavy object\n    const r_heavy=24;\n    ctx.fillStyle='#df8279';ctx.beginPath();ctx.arc(heavy_pos_x,y_heavy,r_heavy,0,Math.PI*2);ctx.fill();\n    glowDot(heavy_pos_x,y_heavy,r_heavy,'rgba(223,130,121,ALPHA)',0.4);\n    ctx.fillStyle='#0a0e12';ctx.fillText('3 kg',heavy_pos_x,y_heavy);\n\n    // Draw velocity vectors\n    const v_scale=0.8;\n    arrow(light_pos_x,y_light-r_light-5,light_pos_x+state.light_v*v_scale,y_light-r_light-5,'#e0b15b',2);\n    arrow(heavy_pos_x,y_heavy-r_heavy-5,heavy_pos_x+state.heavy_v*v_scale,y_heavy-r_heavy-5,'#e0b15b',2);\n\n    // Labels: mass and acceleration\n    ctx.fillStyle=var(--text);ctx.font=Math.round(H*0.026)+'px sans-serif';ctx.textAlign='left';ctx.textBaseline='top';\n    ctx.fillText('Light: a='+(state.light_a).toFixed(1)+' m/s²',W*0.12,H*0.08);\n    ctx.fillText('Heavy: a='+(state.heavy_a).toFixed(1)+' m/s²',W*0.12,H*0.14);\n\n    // Key insight box\n    const box_x=W*0.55,box_y=H*0.08,box_w=W*0.4,box_h=H*0.3;\n    ctx.fillStyle='rgba(78,168,255,0.08)';ctx.fillRect(box_x,box_y,box_w,box_h);\n    ctx.strokeStyle='#4ea8ff';ctx.lineWidth=1.5;ctx.strokeRect(box_x,box_y,box_w,box_h);\n    \n    ctx.fillStyle=var(--text);ctx.font='bold '+Math.round(H*0.032)+'px sans-serif';\n    ctx.textAlign='left';ctx.textBaseline='top';\n    ctx.fillText('Same Force Applied',box_x+12,box_y+8);\n    \n    ctx.font=Math.round(H*0.026)+'px sans-serif';ctx.fillStyle=var(--muted);\n    ctx.fillText('","remediationGoal":"Close wrong_assumption for physics."},"rendererStyle":"three_js"},"simulation_title":"Newton's Second Law (F = ma)"}},"metadata":{"rendered_at":"2026-05-20T13:09:21.689Z","cache_hit":false,"cost_usd":0},"error":null}