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Force & Pressure"}],"title":"Balanced vs Unbalanced Forces","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>Balanced vs Unbalanced Forces</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    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kg</span><input id=\"c-mass\" type=\"range\" min=\"0.5\" max=\"3\" step=\"0.5\" value=\"1.0\"/></label>\n    <label class=\"control\"><span>Friction: <strong id=\"v-friction\">0.0</strong></span><input id=\"c-friction\" type=\"range\" min=\"0\" max=\"1\" step=\"0.2\" value=\"0.0\"/></label>\n    <ul>\n      <li><strong>✓ Misconception:</strong> \"Forces work the same everywhere\"</li>\n      <li><strong>✗ Reality:</strong> Outcome depends on net force, mass &amp; friction</li>\n      <li><strong>Key Idea:</strong> Same forces → different results under different constraints</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\":\"f1\",\"label\":\"Left 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