Ecrit par ✅ Quiz : Energie Potentielle
Ce quiz contient 20 questions.
Note : Placeholder pour valider la structure. Le JSON converti est conservé ci-dessous pour l’import final des vraies questions Tutor LMS.
JSON Tutor LMS-ready
{
"quiz_title": "Energie Potentielle",
"quiz_slug": "11_energie_potentielle_quiz",
"quiz_description": "Quiz Edu509 : Energie Potentielle",
"quiz_settings": {
"time_limit": {
"time_value": 0,
"time_type": "minutes"
},
"hide_quiz_time_display": false,
"attempts_allowed": 0,
"passing_grade": 70,
"max_questions_for_answer": 0,
"questions_order": "rand",
"hide_question_number_overview": false,
"short_answer_characters_limit": 200
},
"questions": [
{
"question_order": 1,
"question_title": "Quelle est l’énergie potentielle de pesanteur d’un objet de masse 4,0 kg placé à 3,0 m au-dessus du sol ? (Prendre \\\\(g = 9{,}8\\\\ \\\\mathrm{m/s^2}\\\\))",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle de pesanteur se calcule par \\\\(E_p = mgh = 4,0 \\\\times 9{,}8 \\\\times 3,0 = 117,6\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "117,6 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "39,2 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "12,0 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "29,4 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 2,
"question_title": "Un ressort de constante \\\\(k = 100\\\\ \\\\mathrm{N/m}\\\\) est comprimé de \\\\(x = 0,20\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle élastique est \\\\(E_{pe} = \\\\frac{1}{2} k x^2 = \\\\frac{1}{2} \\\\times 100 \\\\times (0,20)^2 = 2,0\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "2,0 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "1,0 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,5 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "4,0 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 3,
"question_title": "Un objet de 0,75 kg est posé sur une étagère à 2,0 m du sol. Quelle est son énergie potentielle de pesanteur ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\(E_p = mgh = 0,75 \\\\times 9,8 \\\\times 2,0 = 14,7\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "14,7 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "1,5 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "7,35 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "9,8 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 4,
"question_title": "Quelle(s) grandeur(s) influencent l’énergie potentielle de pesanteur ?",
"question_type": "multiple_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle de pesanteur dépend de la masse et de la hauteur, selon \\\\(E_p = mgh\\\\).",
"answers": [
{
"answer_title": "La masse de l’objet",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "La hauteur par rapport au niveau de référence",
"is_correct": true,
"answer_order": 2
},
{
"answer_title": "La vitesse de l’objet",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La température de l’objet",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 5,
"question_title": "Un ressort a une constante de raideur \\\\(k = 250\\\\ \\\\mathrm{N/m}\\\\) et est étiré de \\\\(x = 0,06\\\\ \\\\mathrm{m}\\\\). Quelle est l’énergie potentielle élastique ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 250 \\\\times (0,06)^2 = \\\\frac{1}{2} \\\\times 250 \\\\times 0,0036 = 0,45\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "0,45 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "0,90 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,18 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "1,50 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 6,
"question_title": "Un objet de 5,0 kg tombe d’une hauteur de 10,0 m à 2,0 m. Quelle est la variation d’énergie potentielle ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La variation est \\\\(\\\\Delta E_p = m g (h_2 - h_1) = 5,0 \\\\times 9,8 \\\\times (2,0 - 10,0) = 5,0 \\\\times 9,8 \\\\times (-8,0) = -392\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "-392 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "392 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "-49 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "49 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 7,
"question_title": "Si on double la hauteur d’un objet, que devient son énergie potentielle de pesanteur ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle de pesanteur est proportionnelle à la hauteur, donc elle double si la hauteur double.",
"answers": [
{
"answer_title": "Elle double",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Elle est divisée par deux",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Elle ne change pas",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Elle est multipliée par quatre",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 8,
"question_title": "Un ressort de \\\\(k = 80\\\\ \\\\mathrm{N/m}\\\\) est comprimé de \\\\(x = 0,15\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 80 \\\\times (0,15)^2 = \\\\frac{1}{2} \\\\times 80 \\\\times 0,0225 = 0,5 \\\\times 1,8 = 0,9\\\\ \\\\mathrm{J}\\\\), mais 80 \\\\times 0,0225 = 1,8, donc \\\\(0,5 \\\\times 1,8 = 0,9\\\\).",
"answers": [
{
"answer_title": "1,20 J",
"is_correct": false,
"answer_order": 1
},
{
"answer_title": "0,45 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,60 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,90 J",
"is_correct": true,
"answer_order": 4
}
]
},
{
"question_order": 9,
"question_title": "Quelle(s) affirmation(s) est/sont vraie(s) concernant l’énergie potentielle élastique ?",
"question_type": "multiple_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle élastique dépend de \\\\(k\\\\) et de \\\\(x^2\\\\), selon \\\\(E_{pe} = \\\\frac{1}{2} k x^2\\\\).",
"answers": [
{
"answer_title": "Elle dépend du carré de l’allongement",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Elle dépend de la constante de raideur du ressort",
"is_correct": true,
"answer_order": 2
},
{
"answer_title": "Elle dépend de la masse de l’objet attaché au ressort",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Elle dépend de la vitesse de compression",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 10,
"question_title": "Un objet de 2,5 kg est soulevé de 1,2 m à 2,0 m. Quelle est la variation d’énergie potentielle ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Variation : \\\\(\\\\Delta E_p = m g (h_2 - h_1) = 2,5 \\\\times 9,8 \\\\times (2,0 - 1,2) = 2,5 \\\\times 9,8 \\\\times 0,8 = 19,6\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "19,6 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "7,35 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "24,5 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "12,25 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 11,
"question_title": "Quelle est l’énergie potentielle de pesanteur d’un objet de 1,0 kg posé au sol (niveau de référence) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Au niveau de référence, la hauteur est nulle donc \\\\(E_p = 0\\\\).",
"answers": [
{
"answer_title": "0 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "9,8 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "1,0 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Impossible à déterminer",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 12,
"question_title": "Un ressort de \\\\(k = 60\\\\ \\\\mathrm{N/m}\\\\) est étiré de \\\\(x = 0,10\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 60 \\\\times (0,10)^2 = \\\\frac{1}{2} \\\\times 60 \\\\times 0,01 = 0,30\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "0,30 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "0,60 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,15 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,06 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 13,
"question_title": "Si la masse d’un objet est multipliée par 3, que devient son énergie potentielle de pesanteur (à hauteur constante) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie potentielle de pesanteur est proportionnelle à la masse.",
"answers": [
{
"answer_title": "Elle est multipliée par 3",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Elle est divisée par 3",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Elle ne change pas",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Elle est multipliée par 9",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 14,
"question_title": "Un objet de 0,5 kg est lâché d’une hauteur de 5,0 m. Quelle énergie potentielle de pesanteur perd-il en touchant le sol ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La perte d’énergie potentielle est \\\\(E_p = mgh = 0,5 \\\\times 9,8 \\\\times 5,0 = 24,5\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "24,5 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "2,5 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "9,8 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "49,0 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 15,
"question_title": "Un ressort de \\\\(k = 120\\\\ \\\\mathrm{N/m}\\\\) est comprimé de \\\\(x = 0,05\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 120 \\\\times (0,05)^2 = \\\\frac{1}{2} \\\\times 120 \\\\times 0,0025 = 0,15\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "0,15 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "0,30 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,60 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,12 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 16,
"question_title": "Laquelle des propositions suivantes est une unité correcte pour l’énergie potentielle ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’unité de l’énergie potentielle est le joule (J).",
"answers": [
{
"answer_title": "Joule (J)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Newton (N)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Watt (W)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Pascal (Pa)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 17,
"question_title": "Un objet de 3,0 kg est placé à 1,5 m au-dessus du sol. Quelle est son énergie potentielle de pesanteur ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\(E_p = mgh = 3,0 \\\\times 9,8 \\\\times 1,5 = 44,1\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "44,1 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "29,4 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "19,6 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "4,41 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 18,
"question_title": "Un ressort de \\\\(k = 50\\\\ \\\\mathrm{N/m}\\\\) est étiré de \\\\(x = 0,20\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 50 \\\\times (0,20)^2 = \\\\frac{1}{2} \\\\times 50 \\\\times 0,04 = 1,0\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "1,0 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "2,0 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,5 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,2 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 19,
"question_title": "Un objet de 2,0 kg est posé sur une table de 0,80 m de haut. Quelle est son énergie potentielle de pesanteur ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On applique \\\\(E_p = mgh = 2,0 \\\\times 9,8 \\\\times 0,80 = 15,68\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "15,68 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "9,8 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "1,6 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "19,6 J",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 20,
"question_title": "Un ressort de \\\\(k = 300\\\\ \\\\mathrm{N/m}\\\\) est comprimé de \\\\(x = 0,04\\\\ \\\\mathrm{m}\\\\). Quelle énergie potentielle élastique est stockée ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "On calcule \\\\(E_{pe} = \\\\frac{1}{2} \\\\times 300 \\\\times (0,04)^2 = \\\\frac{1}{2} \\\\times 300 \\\\times 0,0016 = 0,24\\\\ \\\\mathrm{J}\\\\).",
"answers": [
{
"answer_title": "0,24 J",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "0,48 J",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,12 J",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,36 J",
"is_correct": false,
"answer_order": 4
}
]
}
]
}