<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      width: 100%;
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
    }

    /* Top Given Values Bar */
    .given-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      width: 100%;
      max-width: 480px;
      flex-wrap: wrap;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.2px;
    }

    .pill-f {
      background: #eff6ff;
      color: #2563eb;
      border: 1.5px solid #bfdbfe;
    }

    .pill-s {
      background: #ecfdf5;
      color: #10b981;
      border: 1.5px solid #a7f3d0;
    }

    /* Visual mini-diagram */
    .visual-stage {
      width: 100%;
      max-width: 480px;
      height: 64px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: flex-end;
      padding: 0 16px 8px;
    }

    .ground-line {
      position: absolute;
      bottom: 8px;
      left: 12px;
      right: 12px;
      height: 2px;
      background: #cbd5e1;
    }

    .track {
      position: absolute;
      bottom: 10px;
      left: 30px;
      right: 50px;
      height: 40px;
    }

    .box {
      position: absolute;
      bottom: 0;
      left: 0%;
      width: 38px;
      height: 30px;
      background: #ffffff;
      border: 2px solid #1e2945;
      border-radius: 5px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 13px;
      transition: left 0.6s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 2px 4px rgba(0,0,0,0.06);
    }

    .force-arrow {
      position: absolute;
      right: 100%;
      top: 50%;
      transform: translateY(-50%);
      display: flex;
      align-items: center;
      gap: 2px;
      color: #2563eb;
      font-size: 11px;
      font-weight: 800;
      white-space: nowrap;
      padding-right: 4px;
    }

    .disp-marker {
      position: absolute;
      bottom: -1px;
      left: 30px;
      width: 0%;
      height: 2px;
      background: #10b981;
      transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .disp-label {
      position: absolute;
      top: 4px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 11px;
      font-weight: 700;
      color: #10b981;
      opacity: 0;
      transition: opacity 0.4s ease;
    }

    /* Worked Steps Container */
    .steps-container {
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .step-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      padding: 10px 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.3s ease;
      opacity: 0.35;
    }

    .step-card.active {
      opacity: 1;
      border-color: #cbd5e1;
      box-shadow: 0 3px 8px rgba(0,0,0,0.04);
    }

    .step-card.active.step-3-active {
      border-color: #fcd34d;
      background: #fffbeb;
    }

    .step-badge {
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .step-math {
      font-size: 16px;
      font-weight: 700;
      letter-spacing: 0.3px;
    }

    .val-f { color: #2563eb; }
    .val-s { color: #10b981; }
    .val-w { color: #f59e0b; }

    /* Interactive Stepper Navigation */
    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      width: 100%;
      max-width: 480px;
    }

    .step-btn {
      flex: 1;
      padding: 8px 10px;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      transition: all 0.2s ease;
    }

    .step-btn.selected {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }

    .play-btn {
      width: 36px;
      height: 34px;
      padding: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      cursor: pointer;
      font-size: 13px;
      color: #1e2945;
    }
  </style>
</head>
<body>

  
  <div class="given-row">
    <div class="pill pill-f">
      <span>Force <i>F</i> = 250 N</span>
    </div>
    <div class="pill pill-s">
      <span>Distance <i>s</i> = 4.0 m</span>
    </div>
  </div>

  
  <div class="visual-stage">
    <div class="ground-line"></div>
    <div class="disp-marker" id="dispMarker"></div>
    <div class="track">
      <div class="box" id="box">
        <div class="force-arrow">250 N →</div>
        <i>m</i>
      </div>
    </div>
    <span class="disp-label" id="dispLabel"><i>s</i> = 4.0 m</span>
  </div>

  
  <div class="steps-container">
    
    <div class="step-card active" id="card-0">
      <span class="step-badge">1. Formula</span>
      <div class="step-math">
        <i>W</i> = <span class="val-f"><i>F</i></span> × <span class="val-s"><i>s</i></span>
      </div>
    </div>

    
    <div class="step-card" id="card-1">
      <span class="step-badge">2. Substitute</span>
      <div class="step-math">
        <i>W</i> = (<span class="val-f">250 N</span>) × (<span class="val-s">4.0 m</span>)
      </div>
    </div>

    
    <div class="step-card" id="card-2">
      <span class="step-badge">3. Calculate</span>
      <div class="step-math">
        <i>W</i> = 1000 J = <span class="val-w">1.0 kJ</span>
      </div>
    </div>
  </div>

  
  <div class="controls">
    <button class="step-btn selected" id="btn-0" onclick="setStep(0)">Step 1</button>
    <button class="step-btn" id="btn-1" onclick="setStep(1)">Step 2</button>
    <button class="step-btn" id="btn-2" onclick="setStep(2)">Step 3</button>
    <button class="play-btn" id="playBtn" onclick="togglePlay()" title="Auto play">⏸</button>
  </div>

  <script>
    let currentStep = 0;
    let isPlaying = true;
    let timer = null;

    const box = document.getElementById('box');
    const dispMarker = document.getElementById('dispMarker');
    const dispLabel = document.getElementById('dispLabel');
    const playBtn = document.getElementById('playBtn');

    function updateView() {
      // Update Buttons
      for (let i = 0; i < 3; i++) {
        const btn = document.getElementById(`btn-${i}`);
        const card = document.getElementById(`card-${i}`);
        
        if (i <= currentStep) {
          card.classList.add('active');
          if (i === 2 && currentStep === 2) {
            card.classList.add('step-3-active');
          } else {
            card.classList.remove('step-3-active');
          }
        } else {
          card.classList.remove('active');
          card.classList.remove('step-3-active');
        }

        if (i === currentStep) {
          btn.classList.add('selected');
        } else {
          btn.classList.remove('selected');
        }
      }

      // Update Mini Simulation
      if (currentStep === 0) {
        box.style.left = '0%';
        dispMarker.style.width = '0%';
        dispLabel.style.opacity = '0';
      } else if (currentStep === 1) {
        box.style.left = '50%';
        dispMarker.style.width = 'calc(50% - 20px)';
        dispLabel.style.opacity = '0.7';
      } else {
        box.style.left = 'calc(100% - 38px)';
        dispMarker.style.width = 'calc(100% - 70px)';
        dispLabel.style.opacity = '1';
      }
    }

    function setStep(step) {
      currentStep = step;
      updateView();
    }

    function nextStep() {
      currentStep = (currentStep + 1) % 3;
      updateView();
    }

    function startTimer() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3500);
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      if (isPlaying) {
        playBtn.textContent = '⏸';
        startTimer();
      } else {
        playBtn.textContent = '▶';
        clearInterval(timer);
      }
    }

    // Initialize
    updateView();
    startTimer();
  </script>
</body>
</html>

Work: Force Applied Over a Distance

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 100%;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      width: 100%;
    }

    @media (max-width: 520px) {
      .grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }
    }

    .panel {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      position: relative;
    }

    .panel.success {
      border-color: #86efac;
      background: #f0fdf4;
    }

    .panel.fail {
      border-color: #fca5a5;
      background: #fef2f2;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      font-size: 13px;
      font-weight: bold;
      margin-bottom: 6px;
    }

    .success .status-badge {
      background: #22c55e;
      color: #ffffff;
    }

    .fail .status-badge {
      background: #ef4444;
      color: #ffffff;
    }

    .title {
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 8px;
      line-height: 1.2;
    }

    .success .title { color: #15803d; }
    .fail .title { color: #b91c1c; }

    .stage {
      width: 100%;
      height: 110px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 8px;
    }

    .formula {
      font-size: 13px;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(0, 0, 0, 0.08);
      color: #0f172a;
    }

    /* SVG styling */
    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    .force-arrow { stroke: #2563eb; stroke-width: 3; fill: none; }
    .force-head { fill: #2563eb; }
    .dist-arrow { stroke: #16a34a; stroke-width: 2.5; stroke-dasharray: 4,3; fill: none; }
    .dist-head { fill: #16a34a; }
    .wall { fill: #94a3b8; stroke: #64748b; stroke-width: 1.5; }
    .box { fill: #fde047; stroke: #ca8a04; stroke-width: 2; rx: 4; }
    .char { font-size: 26px; user-select: none; }
    .lbl { font-size: 11px; font-weight: 700; font-family: sans-serif; }
    .lbl-f { fill: #2563eb; }
    .lbl-s { fill: #16a34a; }
    .lbl-zero { fill: #ef4444; font-size: 12px; font-weight: 800; }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="panel success">
      <div class="status-badge">✓</div>
      <div class="title">Work Done</div>
      <div class="stage">
        <svg viewBox="0 0 160 110">
          
          <line x1="10" y1="90" x2="150" y2="90" stroke="#cbd5e1" stroke-width="2" />
          
          
          <rect class="box" x="45" y="46" width="36" height="36" />
          
          
          <line class="force-arrow" x1="50" y1="34" x2="105" y2="34" />
          <polygon class="force-head" points="112,34 104,30 104,38" />
          <text x="76" y="26" class="lbl lbl-f" text-anchor="middle">Force (F)</text>

          
          <line class="dist-arrow" x1="45" y1="98" x2="115" y2="98" />
          <polygon class="dist-head" points="122,98 114,95 114,101" />
          <text x="80" y="109" class="lbl lbl-s" text-anchor="middle">Distance (s)</text>
        </svg>
      </div>
      <div class="formula">W = F × s &gt; 0</div>
    </div>

    
    <div class="panel fail">
      <div class="status-badge">✗</div>
      <div class="title">Zero Distance</div>
      <div class="stage">
        <svg viewBox="0 0 160 110">
          
          <line x1="10" y1="90" x2="150" y2="90" stroke="#cbd5e1" stroke-width="2" />

          
          <rect class="wall" x="110" y="20" width="26" height="70" rx="2" />
          
          <line x1="110" y1="38" x2="136" y2="38" stroke="#64748b" stroke-width="1.5" />
          <line x1="110" y1="56" x2="136" y2="56" stroke="#64748b" stroke-width="1.5" />
          <line x1="110" y1="74" x2="136" y2="74" stroke="#64748b" stroke-width="1.5" />
          
          
          <text x="35" y="80" class="char">🏃</text>

          
          <line class="force-arrow" x1="72" y1="56" x2="102" y2="56" />
          <polygon class="force-head" points="108,56 101,52 101,60" />
          <text x="88" y="48" class="lbl lbl-f" text-anchor="middle">F</text>

          
          <text x="80" y="104" class="lbl-zero" text-anchor="middle">s = 0</text>
        </svg>
      </div>
      <div class="formula">W = F × 0 = 0</div>
    </div>

    
    <div class="panel fail">
      <div class="status-badge">✗</div>
      <div class="title">90° Angle</div>
      <div class="stage">
        <svg viewBox="0 0 160 110">
          
          <line x1="10" y1="90" x2="150" y2="90" stroke="#cbd5e1" stroke-width="2" />

          
          <text x="40" y="80" class="char">🚶</text>
          <rect class="box" x="70" y="45" width="22" height="22" />

          
          <line class="force-arrow" x1="81" y1="42" x2="81" y2="18" />
          <polygon class="force-head" points="81,12 77,19 85,19" />
          <text x="94" y="24" class="lbl lbl-f">F</text>

          
          <polyline points="81,60 92,60 92,72" fill="none" stroke="#64748b" stroke-width="1.5" />
          <circle cx="86.5" cy="66" r="1.5" fill="#64748b" />

          
          <line class="dist-arrow" x1="70" y1="98" x2="130" y2="98" />
          <polygon class="dist-head" points="136,98 129,95 129,101" />
          <text x="100" y="109" class="lbl lbl-s" text-anchor="middle">s</text>
        </svg>
      </div>
      <div class="formula">W = 0 (⊥ Force)</div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      user-select: none;
      -webkit-user-select: none;
    }

    /* Scene Stage */
    .stage {
      position: relative;
      height: 170px;
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      overflow: hidden;
    }

    /* Floor track */
    .floor {
      position: absolute;
      bottom: 34px;
      left: 0;
      right: 0;
      height: 4px;
      background: #cbd5e1;
    }
    .floor-stripes {
      position: absolute;
      bottom: 18px;
      left: 0;
      right: 0;
      height: 16px;
      background: repeating-linear-gradient(135deg, transparent, transparent 6px, #f1f5f9 6px, #f1f5f9 12px);
    }

    /* Ghost/Start outline */
    .ghost-box {
      position: absolute;
      bottom: 38px;
      left: 36px;
      width: 58px;
      height: 58px;
      border: 2px dashed #94a3b8;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #94a3b8;
      font-size: 11px;
      font-weight: 600;
    }

    /* Interactive Box & Force Arrow */
    .box-mover {
      position: absolute;
      bottom: 38px;
      left: 36px;
      width: 58px;
      height: 58px;
      transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
      z-index: 5;
    }
    .box {
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, #2563eb, #1d4ed8);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-size: 18px;
      font-weight: 700;
    }

    /* Force Vector */
    .force-arrow {
      position: absolute;
      top: 50%;
      right: 100%;
      transform: translateY(-50%);
      display: flex;
      align-items: center;
      padding-right: 6px;
      opacity: 0.95;
    }
    .force-line {
      width: 42px;
      height: 4px;
      background: #f59e0b;
      border-radius: 2px;
    }
    .force-head {
      width: 0;
      height: 0;
      border-top: 6px solid transparent;
      border-bottom: 6px solid transparent;
      border-left: 8px solid #f59e0b;
    }
    .force-label {
      position: absolute;
      bottom: 12px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 12px;
      font-weight: 700;
      color: #d97706;
      white-space: nowrap;
    }

    /* Displacement measurement line */
    .ruler-container {
      position: absolute;
      bottom: 6px;
      left: 65px;
      width: calc(100% - 130px);
      height: 24px;
    }
    .ruler-bar {
      position: absolute;
      top: 6px;
      left: 0;
      height: 2px;
      background: #2563eb;
      transition: width 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    }
    .ruler-bar::before, .ruler-bar::after {
      content: '';
      position: absolute;
      top: -4px;
      width: 2px;
      height: 10px;
      background: #2563eb;
    }
    .ruler-bar::before { left: 0; }
    .ruler-bar::after { right: 0; }
    .ruler-text {
      position: absolute;
      top: 9px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 12px;
      font-weight: 700;
      color: #2563eb;
    }

    /* Calculation & Info Cards */
    .card-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 10px;
    }
    @media (max-width: 480px) {
      .card-grid {
        grid-template-columns: 1fr;
      }
    }

    .info-card {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 10px;
      padding: 10px 14px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .formula-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 16px;
      font-weight: 700;
    }
    .var-w { color: #1e2945; }
    .var-f { color: #d97706; }
    .var-s { color: #2563eb; }
    .var-res {
      color: #1e2945;
      background: #f1f5f9;
      padding: 2px 8px;
      border-radius: 6px;
      transition: background 0.3s, color 0.3s;
    }
    .var-res.active {
      background: #dbeafe;
      color: #1d4ed8;
    }

    .badge-card {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 10px;
      padding: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    .badge-pill {
      background: #fef3c7;
      border: 1px solid #fde68a;
      color: #92400e;
      padding: 6px 12px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* Controls Bar */
    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      color: #1e2945;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 8px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn:active {
      background: #f8fafc;
    }
    .btn.primary {
      background: #2563eb;
      border-color: #2563eb;
      color: #ffffff;
    }
    .btn.primary:active {
      background: #1d4ed8;
    }
  </style>
</head>
<body>

  
  <div class="stage" id="stage">
    
    <div class="ghost-box">s = 0</div>

    
    <div class="box-mover" id="boxMover">
      <div class="force-arrow">
        <div class="force-label">F = 10 N</div>
        <div class="force-line"></div>
        <div class="force-head"></div>
      </div>
      <div class="box">m</div>
    </div>

    
    <div class="floor-stripes"></div>
    <div class="floor"></div>

    
    <div class="ruler-container" id="rulerContainer">
      <div class="ruler-bar" id="rulerBar" style="width: 0%;">
        <div class="ruler-text" id="rulerText">s = 0 m</div>
      </div>
    </div>
  </div>

  
  <div class="card-grid">
    <div class="info-card">
      <div class="formula-row">
        <span class="var-w">W</span> = 
        <span class="var-f">F</span> × 
        <span class="var-s">s</span>
      </div>
      <div class="formula-row" style="margin-top: 4px; font-size: 14px;">
        <span class="var-w">W</span> = 
        <span class="var-f">10 N</span> × 
        <span class="var-s" id="calcDist">0 m</span> = 
        <span class="var-res" id="calcResult">0 J</span>
      </div>
    </div>

    <div class="badge-card">
      <div class="badge-pill">
        <span>✦</span> 1 J = 1 N·m
      </div>
    </div>
  </div>

  
  <div class="controls">
    <button class="btn primary" id="pushBtn">▶ Push (s = 3 m)</button>
    <button class="btn" id="resetBtn">↺ Reset</button>
  </div>

  <script>
    const boxMover = document.getElementById('boxMover');
    const rulerBar = document.getElementById('rulerBar');
    const rulerText = document.getElementById('rulerText');
    const calcDist = document.getElementById('calcDist');
    const calcResult = document.getElementById('calcResult');
    const pushBtn = document.getElementById('pushBtn');
    const resetBtn = document.getElementById('resetBtn');
    const stage = document.getElementById('stage');

    let isPushed = false;

    function applyState(moved) {
      isPushed = moved;
      if (moved) {
        // Calculate max travel distance relative to stage width
        const stageWidth = stage.clientWidth;
        const travelPx = Math.max(stageWidth - 130, 140);

        boxMover.style.transform = `translateX(${travelPx}px)`;
        rulerBar.style.width = '100%';
        rulerText.textContent = 's = 3 m';
        calcDist.textContent = '3 m';
        calcResult.textContent = '30 J';
        calcResult.classList.add('active');
        pushBtn.textContent = '⏸ Pause';
      } else {
        boxMover.style.transform = 'translateX(0px)';
        rulerBar.style.width = '0%';
        rulerText.textContent = 's = 0 m';
        calcDist.textContent = '0 m';
        calcResult.textContent = '0 J';
        calcResult.classList.remove('active');
        pushBtn.textContent = '▶ Push (s = 3 m)';
      }
    }

    pushBtn.addEventListener('click', () => {
      applyState(!isPushed);
    });

    resetBtn.addEventListener('click', () => {
      applyState(false);
    });

    // Auto-cycle gently on initial load to show concept
    let initialTimer = setTimeout(() => {
      applyState(true);
    }, 800);

    // Cancel auto on user interaction
    [pushBtn, resetBtn].forEach(el => {
      el.addEventListener('pointerdown', () => clearTimeout(initialTimer));
    });
  </script>
</body>
</html>

UK-GCSE-SCIENCE-PHYS-FOR-02

Child standards (1)

Aligned learning resources

Related diagrams