
Tipuri de forte
Authored by ISABELA CIUREA
Physics
9th Grade
Used 23+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Greutatea unui corp cu masa de 150 g este de aproximativ:
1500 N
1, 5 N
150N
0,15N
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Cartea este in repaus pe masa. Alegeti afirmatia corecta:
greutate si normala la suprafata de contact se anuleza reciproc
forta de apasare a cartii asupra mesei se anuleaza cu reactiunea normala a mesei
actiunea si rectiunea se anuleaza reciproc pentru ca actioneaza asupra aceluiasi corp/ cartea
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
In cazul Pamantului, cceleratia gravitationala medie la ecuator este mai mare decat acceleratia gravitationala medie la poli
adevarat
fals
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Stiind ca sursa campului gravitational o constituie masa, privind imaginea alaturata, putem constata ca la aceeasi latitudine, pe glob exista anomalii / abateri fata de valoarea medie a aceeleratiei gravitationale, in plus sau in minus, conform indicatiior din subsolul imaginii.
Zonele colorate in portocaliu -rosu corespund marilor si oceanelor pentru ca acolo este concentrata mai multa masa
Zonele colorate in portocaliu -rosu corespund muntilor pentru ca acolo este concentrata mai multa masa
Zonele colorate in albastru corespund oceanelor si marilor pentru ca acolo este concentrata mai multa masa
Zonele colorate in albastru corespund oceanelor si muntilor pentru ca acolo este multa masa
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Graficul alaturat reprezinta dependenta de timp a fortei minima care trage un obiect cu masa m= 100g pe un plan orizontal.
Forta de frecare statica este mai mica decat cea dinamica
Forta de frecare statica este 0,7 N iar cea dinamica este 1,2 N
forta de frecare statica nu difera de cea dinamica
Forta de frecare statica este 0,12 N iar cea dinamica este 0,07 N
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Daca masa obiectului este m=100g, atunci coeficientul de frecare dinamic este de aproximativ:
0,12
0,07
1,2
7
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Forta de frecare la alunecare este mai mare in cazul in care suprafetele in contact sunt mai lucioase
adevarat
fals
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