Energie cinétique
Quiz
•
Physics
•
11th Grade
•
Practice Problem
•
Hard
Benoit Flasque
Used 48+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Quelle est la bonne expression du travail de la force
sur le trajet d'un point A à un point B ?
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Quelles sont la ou les force(s) ayant un travail strictement positif ?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Le travail du poids d'un objet de masse m = 50 kg s'élevant d'une hauteur h = 10 m dans un champ de pesanteur d'intensité g = 10 m.s-2 vaut :
W = 500 J.
W = -5 kJ.
W = -50 J.
W = 5 000 J.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
La vitesse v d'un système de masse et d'énergie cinétique EC vaut :
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Le travail des forces de frottements lors d'un déplacement :
est toujours positif.
est toujours nul.
est toujours négatif.
a un signe variable.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Le travail d'une force s'exprime en :
joule.
watt.
newton.
newton par mètre.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
L'énergie cinétique d'une balle de golf de masse m = 100 g et d'une vitesse de 36,0 km·h-1 vaut :
5,00 J.
64,8 J.
64,8 kJ.
5,00 kJ.
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