
Lucrul si puterea mecanica
Authored by Mihalcea Cristina
Physics
7th - 8th Grade
Used 66+ times

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16 questions
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1.
MULTIPLE SELECT QUESTION
10 sec • 1 pt
Bunicul efectueaza lucrul mecanic in situatiile:
coboara ochelarii de pe nas pe masa
tine ochelarii pe nas
ridica ochelarii de pe nas
tine ochelarii in mana necalintita
2.
MULTIPLE SELECT QUESTION
10 sec • 1 pt
Unitatea de masura pentru puterea mecanica poate fi:
J
CP
W
N
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Lucrul mecanic este o marime fizica derivata, scalara si:
de stare
de proces
vectoriala
de miscare
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Raportul dintre lucrul mecanic util si lucrul mecanic consumat reprezinta:
coeficientul de frecare
lucrul mecanic
puterea mecanica
randamentul mecanic
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Ce putere se dezvolta pentru a deplasa un corp in intervalul de timp 1min., daca se efectueaza un lucru mecanic de 240J?
2400W
240W
24W
4W
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Un copil cu puterea de 25W actioneaza cu o forta pe durata a 60s. Lucrul mecanic efectuat de catre copil este:
4J
24J
240J
1500J
7.
FILL IN THE BLANK QUESTION
20 sec • 1 pt
Lucrul mecanic motor are valoare...,forta care efectueaza acest lucru mecanic actionand in sensul deplasarii corpului.
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