Mehanički rad i energija
Quiz
•
Physics
•
7th Grade
•
Practice Problem
•
Medium
Vukan Mašić
Used 1+ times
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11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rad se vrši ako
na telo deluje sila
telo se kreće
na telo deluje sila koja izaziva njegovo kretanje
nijedan od ponuđenih odgovora
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Biciklista se kretao stalnom brzinom, a potom je prestao da okreće pedale. Odaberi tačne iskaze.
Sila trenja vrši rad zaustavljajući bicikl.
Biciklista nastavlja da se kreće ravnomerno pravolinijski.
Biciklista je, okrećući pedale, vršio rad i pri tome se kretao.
Nijedan od iskaza nije tačan.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
U kojem od datih slučajeva rad vrši sila zemljine teže?
Slobodno padanje jabuke sa grane
Zaustavljanje voza na stanici
Hodanje pešaka ulicom
Trčanje sportiste u parku
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Merna jedinica za rad je:
džul (J)
kilogram (kg)
Njutn (N)
metar u sekundi (m/s)
5.
CATEGORIZE QUESTION
3 mins • 1 pt
Razvrstaj sile prema tome kakav rad vrše (pozitivan ili negativan):
Groups:
(a) Pozitivan rad
,
(b) Negativan rad
rad vučne sile
rad sile Zemljine teže
rad sile otpora vazduha
rad sile trenja
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Svako telo koje je sposobno da vrši rad ima svoju mehaničku energiju.
TAČNO
NETAČNO
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Energiju kretanja nekog tela nazivamo i:
kinetička energija
potencijalna energija
ukupna mehanička energija
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