energia mecanica
Quiz
•
Physics
•
7th Grade
•
Practice Problem
•
Medium
cristina heres
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7 questions
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1.
MULTIPLE SELECT QUESTION
10 sec • 1 pt
Energia cinetică a unui corp depinde direct proporţional de:
masa
volum
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Energia potenţială gravitaţională depinde direct proporţional de:
viteza corpului
inalţimea faţă de sol la care se află corpul
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Relaţia matematică a energiei cinetice este:
mv/2
mv2/2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Energia cinetică a unui corp:
depinde de sistemul de referinţă ales
este o marime fizică de proces
5.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Un automobil cu masa de 1 tonă, se deplasează rectiliniu şi uniform cu viteza de 72 km/h faţă de şosea. Ce valoare are energia cinetică a maşinii faţă de şosea? Dar faţă de şoferul maşinii?
200kj; 0j
200kj; 200kj
6.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Energia mecanică a unui sistem izolat se conservă dacă:
Este oprit
nu sunt frecări şi este izolat
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
simbolul unitatăţii de măsură pentru energia mecanică este:
m
J
M
Kg
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