TeachAny
دعم
التسعير
Products
العربية
تسجيل الدخول
Products
دعم
التسعير
العربية
### What is Energy Conservation? Energy conservation is a fundamental law of physics stating: > **Total energy in an isolated system remains constant.** <svg width="300" height="150" viewBox="0 0 300 150" xmlns="http://www.w3.org/2000/svg"> <rect x="20" y="40" width="100" height="50" fill="#4CAF50" /> <text x="70" y="70" font-size="16" fill="white" text-anchor="middle" alignment-baseline="middle">Energy</text> <line x1="120" y1="65" x2="180" y2="65" stroke="#000" stroke-width="2" marker-end="url(#arrow)" /> <rect x="180" y="40" width="100" height="50" fill="#2196F3" /> <text x="230" y="70" font-size="16" fill="white" text-anchor="middle" alignment-baseline="middle">Energy</text> <defs> <marker id="arrow" markerWidth="10" markerHeight="10" refX="0" refY="3" orient="auto" markerUnits="strokeWidth"> <path d="M0,0 L0,6 L9,3 z" fill="#000" /> </marker> </defs> </svg> Notice energy moves but total amounts stay the same!
### Kinetic and Potential Energy - **Kinetic energy (KE)** is energy of motion. - **Potential energy (PE)** is stored energy due to position. <svg width="320" height="180" viewBox="0 0 320 180" xmlns="http://www.w3.org/2000/svg"> <!-- Ball at top --> <circle cx="80" cy="50" r="20" fill="#FF5722" /> <text x="80" y="90" font-size="14" text-anchor="middle" fill="#333">PE (High)</text> <!-- Arrow down --> <line x1="80" y1="70" x2="80" y2="120" stroke="#000" stroke-width="2" marker-end="url(#arrow)" /> <!-- Ball at bottom moving --> <circle cx="240" cy="140" r="20" fill="#3F51B5" /> <text x="240" y="170" font-size="14" text-anchor="middle" fill="#333">KE (High)</text> <defs> <marker id="arrow" markerWidth="10" markerHeight="10" refX="0" refY="3" orient="auto" markerUnits="strokeWidth"> <path d="M0,0 L0,6 L9,3 z" fill="#000" /> </marker> </defs> </svg> The ball has maximum potential energy at the top and converts it to kinetic energy as it falls.
### Energy Transformation Energy converts but total remains constant: \[ E_{total} = PE + KE = \text{constant} \] <svg width="400" height="120" viewBox="0 0 400 120" xmlns="http://www.w3.org/2000/svg"> <rect x="20" y="10" width="160" height="100" fill="#FFCC80" /> <text x="100" y="60" font-size="18" text-anchor="middle" fill="#5D4037">Potential Energy</text> <rect x="220" y="10" width="160" height="100" fill="#81D4FA" /> <text x="300" y="60" font-size="18" text-anchor="middle" fill="#01579B">Kinetic Energy</text> <text x="200" y="110" font-size="16" text-anchor="middle" fill="#000">Total Energy = Constant</text> <line x1="180" y1="60" x2="220" y2="60" stroke="#000" stroke-width="3" marker-end="url(#arrow)" marker-start="url(#arrow)" /> <defs> <marker id="arrow" markerWidth="10" markerHeight="10" refX="0" refY="3" orient="auto" markerUnits="strokeWidth"> <path d="M0,0 L0,6 L9,3 z" fill="#000" /> </marker> </defs> </svg>
### Quiz Time! At the highest point on a roller coaster: - A) Kinetic Energy - B) Potential Energy <div class="fragment">Answer: **B) Potential Energy**</div>
### Roller Coaster Energy <svg width="300" height="150" viewBox="0 0 300 150" xmlns="http://www.w3.org/2000/svg"> <path d="M20 130 Q 80 20 140 130 T 260 130" fill="none" stroke="#795548" stroke-width="4" /> <circle cx="80" cy="20" r="15" fill="#E64A19" /> <text x="80" y="15" font-size="12" fill="#fff" text-anchor="middle">High PE</text> <circle cx="140" cy="130" r="15" fill="#1E88E5" /> <text x="140" y="125" font-size="12" fill="#fff" text-anchor="middle">High KE</text> </svg>
### Other Energy Forms Energy can convert into: - Thermal energy (heat) - Chemical energy - Electrical energy <svg width="300" height="150" viewBox="0 0 300 150" xmlns="http://www.w3.org/2000/svg"> <rect x="20" y="40" width="100" height="50" fill="#FF7043" /> <text x="70" y="70" font-size="16" fill="white" text-anchor="middle">Mechanical Energy</text> <line x1="120" y1="65" x2="180" y2="65" stroke="#000" stroke-width="2" marker-end="url(#arrow)" /> <rect x="180" y="40" width="100" height="50" fill="#FDD835" /> <text x="230" y="70" font-size="16" fill="#333" text-anchor="middle">Thermal Energy</text> <defs> <marker id="arrow" markerWidth="10" markerHeight="10" refX="0" refY="3" orient="auto" markerUnits="strokeWidth"> <path d="M0,0 L0,6 L9,3 z" fill="#000" /> </marker> </defs> </svg>
### Summary - Energy cannot be created or destroyed. - Energy changes form: potential, kinetic, thermal, chemical, etc. - Total energy of an isolated system remains constant. <svg width="320" height="120" viewBox="0 0 320 120" xmlns="http://www.w3.org/2000/svg"> <circle cx="50" cy="60" r="40" fill="#4CAF50" /> <text x="50" y="65" font-size="16" fill="#fff" text-anchor="middle">Total Energy</text> <circle cx="270" cy="60" r="40" fill="#2196F3" /> <text x="270" y="65" font-size="16" fill="#fff" text-anchor="middle">Total Energy</text> <line x1="90" y1="60" x2="230" y2="60" stroke="#000" stroke-width="3" marker-end="url(#arrow)" marker-start="url(#arrow)" /> <defs> <marker id="arrow" markerWidth="10" markerHeight="10" refX="0" refY="3" orient="auto" markerUnits="strokeWidth"> <path d="M0,0 L0,6 L9,3 z" fill="#000" /> </marker> </defs> </svg>
### Closing Thoughts Energy conservation guides our understanding of the physical world. Keep exploring and stay curious! 🚀
1 / 8