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MERENJE
Nina Pavlović
Sofija Obradovi VII1ć
ISTORIJA MERENJA

Zbog lak e trgovine, rezmene stvari, organizovanja...ljudi suš
dobili potrebu da imaju informaciju koliko je sta tesko,
duga ko, koliko ta vredi, koliko je vremena potrebno, a da bič š
te informacije imali ljudi su morali da ih izmere.

U po etku ljudi su za dobijanje tih informacija koristilič
primitivne metode kao sto su: palac, lakat, stopa…
ISTORIJA MERENJA

Naravno, te metode su bile nepouzdane zato sto su
se razlikovale od osobe do osobe.

Da bi dobili jedinstvene veli ine ovek je imaoč č
potrebu da ustanovi standardne veli ine koje bi imaleč
iste vrednosti u celom svetu MEDJUNARODNI
OP TEPRIHVA EN SISTEM MERNIH JEDINICA KOJIŠ Ć
SADR I 7 OSNOVNIH FIZI KIH VELI INA.Ž Č Č
FIZI KE VELI INEČ Č

Veli ine koje karakteri u fizi ke osobine,č š č
materije ili fizi ku pojavu zovu se FIZI KEč Č
VELI INE.Č

Zajedni ka osobina za fizi ke veli ine je dač č č
se one mogu MERITI.

One imaju: oznaku, brojnu vrednost i mernu
jedinicu.Pod fizi kom veli inom podrazumevač č
se odre eni pojam koji bli e i preciznijeđ ž
odre uje neku fizi ku pojavu ili osobinuđ č
prirode.
FIZI KE VELI INEČ Č
SI SISTEM
SI PREFIKSI

SI prefiks je prefiks koji
mo e da se doda na bilož
koju jedinicu
Me unarodnog sistemađ
jedinica (SI) kako bi
dobili ve e i manjeć
jedinice.
MERILA

Merila su jedinstveni
uredjaji pomo u kojihć
se direktnim merenjem
odre uje (o itava)đ č
brojna vrednost.
MERNI INSTRUMENTI

Merni instrumenti su
slo eni ure aji kojima sež đ
posredno (pomo u nekogć
tehni kog postupka)č
odre uje brojna vrednostđ
fizi ke veli ine.č č
GRE KE PRI MERENJUŠ

U toku merenja fizi kih veli ina mogu e su gre ke. Nijednoč č ć š
merenje nije sasvim ta no, ve uvek daje neki pribli nič ć ž
rezultat. Gre ke prilikom merenja mogu da se pojave izš
razli izih razloga.č

slu ajne gre ke (nastaju zbog nepravilnog postupka)č š

sistematske gre ke (nastaju zbog neispravnosti uredjaja).š
TA NOST MERENJAČ

Ta nost mernog sistema je stepen bliskostič
izmerene koli ine njenoj stvarnoj (pravoj)č
vrednosti. Ta nost svakog pojedina nogč č
merenja procenjuje se apsolutnom gre komš
koja je jednaka apsolutnoj vrednosti razlike
srednje i pojedina ne izmerene veli ine.č č
PITANJA
1) Za to je nastalo merenje?š
2) Koje su fizi ke veli ine?č č
3) ta je SI?Š
4) ta su merila i merni instrumenti?Š
5)Kakve mogu da budu gre ke pri merenju?š
HVALA NA PA NJI!Ž

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Merenje4 sofija i nina

  • 2. ISTORIJA MERENJA  Zbog lak e trgovine, rezmene stvari, organizovanja...ljudi suš dobili potrebu da imaju informaciju koliko je sta tesko, duga ko, koliko ta vredi, koliko je vremena potrebno, a da bič š te informacije imali ljudi su morali da ih izmere.  U po etku ljudi su za dobijanje tih informacija koristilič primitivne metode kao sto su: palac, lakat, stopa…
  • 3. ISTORIJA MERENJA  Naravno, te metode su bile nepouzdane zato sto su se razlikovale od osobe do osobe.  Da bi dobili jedinstvene veli ine ovek je imaoč č potrebu da ustanovi standardne veli ine koje bi imaleč iste vrednosti u celom svetu MEDJUNARODNI OP TEPRIHVA EN SISTEM MERNIH JEDINICA KOJIŠ Ć SADR I 7 OSNOVNIH FIZI KIH VELI INA.Ž Č Č
  • 4. FIZI KE VELI INEČ Č  Veli ine koje karakteri u fizi ke osobine,č š č materije ili fizi ku pojavu zovu se FIZI KEč Č VELI INE.Č  Zajedni ka osobina za fizi ke veli ine je dač č č se one mogu MERITI.  One imaju: oznaku, brojnu vrednost i mernu jedinicu.Pod fizi kom veli inom podrazumevač č se odre eni pojam koji bli e i preciznijeđ ž odre uje neku fizi ku pojavu ili osobinuđ č prirode.
  • 5. FIZI KE VELI INEČ Č
  • 7. SI PREFIKSI  SI prefiks je prefiks koji mo e da se doda na bilož koju jedinicu Me unarodnog sistemađ jedinica (SI) kako bi dobili ve e i manjeć jedinice.
  • 8. MERILA  Merila su jedinstveni uredjaji pomo u kojihć se direktnim merenjem odre uje (o itava)đ č brojna vrednost.
  • 9. MERNI INSTRUMENTI  Merni instrumenti su slo eni ure aji kojima sež đ posredno (pomo u nekogć tehni kog postupka)č odre uje brojna vrednostđ fizi ke veli ine.č č
  • 10. GRE KE PRI MERENJUŠ  U toku merenja fizi kih veli ina mogu e su gre ke. Nijednoč č ć š merenje nije sasvim ta no, ve uvek daje neki pribli nič ć ž rezultat. Gre ke prilikom merenja mogu da se pojave izš razli izih razloga.č  slu ajne gre ke (nastaju zbog nepravilnog postupka)č š  sistematske gre ke (nastaju zbog neispravnosti uredjaja).š
  • 11. TA NOST MERENJAČ  Ta nost mernog sistema je stepen bliskostič izmerene koli ine njenoj stvarnoj (pravoj)č vrednosti. Ta nost svakog pojedina nogč č merenja procenjuje se apsolutnom gre komš koja je jednaka apsolutnoj vrednosti razlike srednje i pojedina ne izmerene veli ine.č č
  • 12. PITANJA 1) Za to je nastalo merenje?š 2) Koje su fizi ke veli ine?č č 3) ta je SI?Š 4) ta su merila i merni instrumenti?Š 5)Kakve mogu da budu gre ke pri merenju?š
  • 13. HVALA NA PA NJI!Ž