
TRENJE IN UPOR
Authored by TOMAŽ KRANJC
Physics
8th Grade
Used 5+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
OD ČESA JE ODVISNA SILA TRENJA?
hitrosti
hrapavosti podlage
gostote
oblike telesa
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
KAJ SE SPREMENI, ČE DRGNEMO DLAN OB DLAN, POTEM PA DODAMO KAPLJICO MILA?
Sila trenja se poveča
Sila upora se zmanjša
Sila upora se poveča
Sila trenja se zmanjša
Sila trenja se ne spremeni
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
KAJ SE ZGODI, ČE POVEČAMO HRAPAVOST POVRŠINE?
poveča se sila upora
zmanjša se sila trenja
zmanjša se sila upora
poveča se sila trenja
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
KAJ OD NAŠTETEGA ZMANJŠUJE UPOR?
zmanjšanje hrapavosti površine
aerodinamična oblika telesa
zmanjšanje površine telesa
povečanje hitrosti
oglata oblika telesa
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
OD ČESA JE ODVISEN UPOR?
gostote tekočine skozi katero se telo giblje
mase telesa
hitrosti telesa
barve telesa
oblike telesa
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
ČE KVADER Z DOLŽINO 7 cm, ŠIRINO 5 cm in VIŠINO 3 cm POTISKAMO PO SREDNJE VELIKI PLOSKVI, JE PRI TEM SILA TRENJA :
večja kot sila trenja pod najmanjšo ploskvijo
manjša kot sila trenja pod največjo ploskvijo
enako velika kot sila trenja pod najmanjšo ploskvijo
enako velika kot sila trenja pod največjo ploskvijo
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ČE KVADER Z DOLŽINO 7 cm, ŠIRINO 5 cm in VIŠINO 3 cm POTISKAMO PO GLADKI RAVNI POVRŠINI, KI SMO JO PREMAZALI Z OLJEM, SMO:
povečali trenje
zmanjšali upor
zmanjšali trenje
povečali upor
ni sprememb v trenju , niti v uporu
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