Quiz — Equation pour la physique résumé du cour.pdf

Question 1 sur 10 20:00

[{"id":166032,"question":"Quelle est l'équation qui relie la force, la masse et l'accélération selon la 2ème loi de Newton ?","option_a":"F = m × a","option_b":"F = m \/ a","option_c":"F = a \/ m","option_d":"F = m + a","option_e":"","option_f":"","bonne_reponse":"a","explication":"La 2ème loi de Newton s'exprime par F = m × a, où F est la force, m la masse et a l'accélération.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"F = m × a\", \"b\": \"F = m \/ a\", \"c\": \"F = a \/ m\", \"d\": \"F = m + a\"","_debug_options_count":4},{"id":166033,"question":"Dans un circuit électrique, si la tension U = 12 V et la résistance R = 4 Ω, quelle est l'intensité I ?","option_a":"I = 3 A","option_b":"I = 48 A","option_c":"I = 0,33 A","option_d":"I = 8 A","option_e":"","option_f":"","bonne_reponse":"a","explication":"D'après la loi d'Ohm : I = U \/ R = 12 V \/ 4 Ω = 3 A.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"I = 3 A\", \"b\": \"I = 48 A\", \"c\": \"I = 0,33 A\", \"d\": \"I = 8 A\"}}","_debug_options_count":4},{"id":166034,"question":"Vrai ou Faux ? L'équation de mouvement MRUA : x = x0 + v0t + ½at² s'applique uniquement en l'absence de frottements.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Cette équation s'applique même en présence de frottements, mais l'accélération a alors une valeur différente.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":166035,"question":"Quelle équation permet de calculer l'énergie cinétique d'un corps en mouvement ?","option_a":"Ec = ½mv²","option_b":"Ec = mgh","option_c":"Ec = F × d","option_d":"Ec = m \/ v²","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie cinétique est donnée par Ec = ½mv², où m est la masse et v la vitesse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Ec = ½mv²\", \"b\": \"Ec = mgh\", \"c\": \"Ec = F × d\", \"d\": \"Ec = m \/","_debug_options_count":4},{"id":166036,"question":"Vrai ou Faux ? La loi de conservation de l'énergie stipule que l'énergie totale d'un système isolé reste constante.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de conservation de l'énergie affirme que l'énergie totale (cinétique + potentielle + autres formes) reste constante dans un système isolé.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":166037,"question":"Quelle est l'équation qui relie la pression P, la force F et la surface S ?","option_a":"P = F \/ S","option_b":"P = F × S","option_c":"P = S \/ F","option_d":"P = F + S","option_e":"","option_f":"","bonne_reponse":"a","explication":"La pression est définie par P = F \/ S, où F est la force normale et S la surface.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"P = F \/ S\", \"b\": \"P = F × S\", \"c\": \"P = S \/ F\", \"d\": \"P = F + S\"","_debug_options_count":4},{"id":166038,"question":"Dans un mouvement circulaire uniforme, quelle est la relation entre la vitesse angulaire ω, le rayon r et la vitesse linéaire v ?","option_a":"v = ω × r","option_b":"v = ω \/ r","option_c":"v = r \/ ω","option_d":"v = ω + r","option_e":"","option_f":"","bonne_reponse":"a","explication":"La vitesse linéaire v est liée à la vitesse angulaire ω par v = ω × r.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"v = ω × r\", \"b\": \"v = ω \/ r\", \"c\": \"v = r \/ ω\", \"d\": \"v = ω ","_debug_options_count":4},{"id":166039,"question":"Vrai ou Faux ? L'équation des gaz parfaits est PV = nRT.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'équation des gaz parfaits est bien PV = nRT, où P est la pression, V le volume, n la quantité de matière, R la constante des gaz parfaits et T la température absolue.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":166040,"question":"Quelle équation permet de calculer la puissance électrique P dissipée dans une résistance R parcourue par un courant I ?","option_a":"P = R × I²","option_b":"P = U × I","option_c":"P = U² \/ R","option_d":"P = I \/ R","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance électrique peut être calculée par P = R × I², P = U × I ou P = U² \/ R selon les données disponibles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"P = R × I²\", \"b\": \"P = U × I\", \"c\": \"P = U² \/ R\", \"d\": \"P = I","_debug_options_count":4},{"id":166041,"question":"Vrai ou Faux ? La loi de la gravitation universelle de Newton s'écrit F = G × (m1 × m2) \/ d².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de la gravitation universelle est bien F = G × (m1 × m2) \/ d², où G est la constante gravitationnelle, m1 et m2 les masses, et d la distance entre les centres de masse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]