mehanika-1
Quiz
•
Physics
•
10th Grade
•
Practice Problem
•
Hard
Dam Lov
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kamen je bačen vertikalno uvis, u trenu T dosegne najvišu točku, i konačno padne nazad na tlo. Za akceleraciju kamena tokom njegovog gibanja se može kazati:
Čitavo vrijeme je nula.
Prvo je usmjerena prema gore, a nakon T prema dolje.
Čitavo vrijeme je usmjerena prema gore.
Čitavo vrijeme je usmjerena prema dolje.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Dva tijela A i B kreću iz iste lokacije i gibaju se po pravcu u istom smjeru. Tijelo A ima brzinu 5.0 m/s, a tijelo B kreće iz mirovanja i ima akceleraciju 1.0 m/s2 . Nakon koliko vremena će se ta dva tijela nanovo sresti?
1 s
5 s
10 s
25 s
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dvije sile iznosa: 3.0 N i 4.0 N djeluju okomito jedna na drugu, na tijelo mase 500 g. Iznos akceleracije tijela je:
0.01 m/s2
10 m/s2
100 m/s2
0.1 m/s2
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Dva jednaka tijela A i B padaju iz mirovanja sa različitih visina: h(A) i h(B). Ako tijelo B pada 2 puta duže od tijela A, koji je omjer visina sa kojih su ispušteni: h(B) / h(A) ? Zanemariti trenje.
8
2
4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koji od navedenih skupova veličina sadrži dvije vektorske i dvije skalarne veličine?
rad, pomak, količina gibanja, brzina
kinetička energija, brzina, masa, sila
akceleracija, vrijeme, rad, masa
pomak, sila, put, brzina
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
U neelastičnom sudaru vrijedi zakon očuvanja za:
kinetičku energiju.
količinu gibanja.
kinetičku energiju i količinu gibanja.
niti za kinetičku energiju niti za količinu gibanja.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Mala kugla mase 200 g padne na mekano tlo brzinom 4.0 m/s i uroni 10.0 cm duboko. Prosječna sila otpora tla koja zaustavlja kuglu je (približno):
16 N
32 N
40 N
80 N
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