
Test lucru mecanic, putere mecanica, randament

Quiz
•
Science
•
7th Grade
•
Medium

MARIANA HOLCA
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Expresia lucrului mecanica este:
L = F/d
L = F x d
L = F x v
L = F/v
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unitatea de masura pentru puterea mecanica este:
W
J
KWh
N
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lucrul mecanic este o marime:
vectoriala
scalara
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unitatea de masura pentru lucrul mecanic este:
N
J
W
Cal putere
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un CP(cal putere) are:
376 W
36 W
736 W
636 W
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Randamentul mecanic :
se masoara in Joule
este adimensional
este supraunitar
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Motorasul unei jucarii are puterea egala cu 4 W. Lucrul mecanic efectuat de aceasta timp de 2h este:
28 kJ
4,14 kJ
288 J
28,8kJ
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