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[
{
"slide": 1,
"fragments": [
{
"fragment_index": -1,
"text_description": "Balanced Force\nEqual pushes, zero motion.",
"image_description": ""
}
]
},
{
"slide": 2,
"fragments": [
{
"fragment_index": 1,
"text_description": "Key Term",
"image_description": ""
},
{
"fragment_index": 2,
"text_description": "Balanced Force",
"image_description": ""
},
{
"fragment_index": 3,
"text_description": "When all forces on an object cancel out, the net force is 0 N. The object stays at rest or moves without changing speed or direction.",
"image_description": ""
},
{
"fragment_index": 4,
"text_description": "Quick check: If the net force on a parked car is zero, will its speed change? (Yes / No)",
"image_description": ""
}
]
},
{
"slide": 3,
"fragments": [
{
"fragment_index": -1,
"text_description": "Tug of Forces",
"image_description": ""
},
{
"fragment_index": 1,
"text_description": "Equal pulls cancel out; the block remains still.",
"image_description": "https://asset.sparkl.ac/pb/sparkl-vector-images/img_ncert/AJj6cTCm91OH6lL698t396KROGMkaGltgpA2mQNa.png"
},
{
"fragment_index": 2,
"text_description": "Balanced Force on a Wooden Block\nA wooden block is tied to two opposite strings, X and Y.\nTwo students pull the strings with equal strength in opposite directions.\nThe forces balance, net force \\(=0\\), so the block stays at rest.\nKey Points:\nEqual magnitude, opposite direction → balanced force.\nNet force \\(0\\) keeps the block stationary.\nIf one side pulls harder, balance breaks and the block moves that way.",
"image_description": ""
}
]
},
{
"slide": 4,
"fragments": []
},
{
"slide": 5,
"fragments": [
{
"fragment_index": -1,
"text_description": "Box & Friction",
"image_description": ""
},
{
"fragment_index": 1,
"text_description": "Arrows show applied push and opposing friction",
"image_description": "https://asset.sparkl.ac/pb/sparkl-vector-images/img_ncert/q7sw1ldTC4fIaVeUNnHWYLU3F3ER5ePmnRv0v5Fn.png"
},
{
"fragment_index": 2,
"text_description": "Push vs Friction on a Box\nStatic friction opposes your push and grows with the applied force.\nWhen forces are balanced, the net force is zero and the box stays still.",
"image_description": ""
},
{
"fragment_index": 3,
"text_description": "Key Points:\nGentle push: balanced forces (push = friction) → box remains at rest.\nModerate push: still balanced, no motion.\nPush exceeds maximum friction: unbalanced force → box accelerates forward.",
"image_description": ""
}
]
},
{
"slide": 6,
"fragments": [
{
"fragment_index": 1,
"text_description": "Assessment: Balanced Net Force",
"image_description": ""
},
{
"fragment_index": 2,
"text_description": "Question\nWhen forces on an object are balanced, the net force on the object is:",
"image_description": ""
},
{
"fragment_index": 3,
"text_description": "1\n0 N",
"image_description": ""
},
{
"fragment_index": 4,
"text_description": "2\n10 N to the left",
"image_description": ""
},
{
"fragment_index": 5,
"text_description": "3\n10 N to the right",
"image_description": ""
},
{
"fragment_index": 6,
"text_description": "4\nCannot be determined",
"image_description": ""
},
{
"fragment_index": 7,
"text_description": "Hint:\nAdd the forces — remember opposite directions cancel.",
"image_description": ""
},
{
"fragment_index": 8,
"text_description": "Submit Answer",
"image_description": ""
},
{
"fragment_index": -1,
"text_description": "Correct!\nExactly! 0 N means no change in motion.\nIncorrect\nCheck the directions and magnitudes again.\nconst correctOption = 0;\n const answerCards = Array.from(document.querySelectorAll('.answer-card'));\n const submitBtn = document.getElementById('slide-06-b7f3c2-submitBtn');\n const feedbackCorrect = document.getElementById('slide-06-b7f3c2-feedbackCorrect');\n const feedbackIncorrect = document.getElementById('slide-06-b7f3c2-feedbackIncorrect');\n\n let selectedOption = null;\n\n answerCards.forEach((card, index) => {\n card.addEventListener('click', () => {\n answerCards.forEach(c => c.classList.remove('border-blue-500', 'bg-blue-50'));\n card.classList.add('border-blue-500', 'bg-blue-50');\n selectedOption = index;\n });\n });\n\n submitBtn.addEventListener('click', () => {\n if (selectedOption === null) return;\n\n if (selectedOption === correctOption) {\n feedbackCorrect.classList.remove('hidden');\n feedbackIncorrect.classList.add('hidden');\n } else {\n feedbackIncorrect.classList.remove('hidden');\n feedbackCorrect.classList.add('hidden');\n }\n });",
"image_description": ""
}
]
},
{
"slide": 7,
"fragments": [
{
"fragment_index": -1,
"text_description": "Key Takeaways",
"image_description": ""
},
{
"fragment_index": 1,
"text_description": "⚖️\nNet Force Zero\nEqual & opposite forces cancel out.",
"image_description": ""
},
{
"fragment_index": 2,
"text_description": "🛑\nNo Change in Motion\nRest stays rest; moving stays same speed.",
"image_description": ""
},
{
"fragment_index": 3,
"text_description": "🎯\nDirection Matters\nForces must act opposite to balance.",
"image_description": ""
},
{
"fragment_index": 4,
"text_description": "🧪\nTest with Sliders\nEqual arrows → balanced; unequal → moves.",
"image_description": ""
}
]
}
]