Qhov nrug thiab kev hloov chaw - teeb meem thiab kev daws teeb meem

Kev ncua deb thiab kev hloov chaw - teeb meem thiab kev daws teeb meem

1. Ib lub tsheb khiav raws txoj kev ncaj nraim 100 m mus rau sab hnub tuaj ces 50 m mus rau sab hnub poob. Nrhiav qhov deb thiab qhov txav ntawm lub tsheb.

tshuaj Kev Nrug Deb thiab Kev Hloov Chaw - Teeb Meem thiab Kev Dais Teeb Meem 1

Qhov deb yog 100 meters + 50 meters = 150 meters

Qhov kev hloov chaw yog 100 meters - 50 meters = 50 meters, mus rau sab hnub tuaj.

2. Ib tug neeg taug kev 4 meters mus rau sab hnub tuaj, ces taug kev 3 meters mus rau sab qaum teb. Txheeb xyuas qhov deb thiab kev hloov chaw.

tshuaj

Kev Nrug Deb thiab Kev Hloov Chaw - Teeb Meem thiab Kev Dais Teeb Meem 2

3. Ib tug neeg khiav ncig txoj kev plaub fab uas ntev = 50 meters thiab dav = 20 meters. Tom qab khiav ncig txoj kev plaub fab ob zaug, tus neeg khiav rov qab mus rau qhov chaw pib. Txheeb xyuas qhov deb thiab kev hloov chaw.

tshuaj

Lub voj voog ntawm lub duab plaub fab = 2 (50 meters) + 2 (20 meters) = 100 meters + 40 meters = 140 meters.

Mus ncig lub duab plaub fab 2 zaug = 2(140 meters) = 280 meters.

Qhov Nrug = 280 m.

Kev Hloov Chaw = 0 m . (tus neeg khiav rov qab mus rau qhov chaw pib)

4. Lub ntsuas ceev ntawm lub tsheb nyeem tau 10,500 km thaum pib ntawm kev mus ncig thiab 10,700 km thaum kawg. Txheeb xyuas qhov deb thiab kev hloov chaw.

tshuaj

Luas = 10,700 km – 10,500 km = 200 km.

Kev Hloov Chaw = 0 km. (lub tsheb rov qab mus rau qhov chaw pib)

1. Qhov deb yog dab tsi? Lus teb: Qhov deb yog tag nrho kev txav ntawm ib yam khoom, tsis hais qhov kev taw qhia twg.

2. Kev hloov chaw yog dab tsi? Lus teb: Kev hloov chaw yog qhov deb luv tshaj plaws ntawm qhov chaw pib thiab qhov chaw kawg ntawm ib yam khoom, nrog rau kev taw qhia tshwj xeeb.

3. Puas muaj qhov deb tsawg dua li qhov hloov chaw? Lus teb: Tsis yog. Qhov deb yeej ib txwm loj dua lossis sib npaug rau qhov hloov chaw.

4. Yog tias ib tug neeg taug kev ncig ib txoj kev ncig thiab xaus rau ntawm qhov chaw pib, qhov kev hloov chaw yog dab tsi? Lus teb: Qhov kev hloov chaw yog xoom vim tias qhov chaw pib thiab qhov chaw kawg yog tib yam.

5. Cov chav ntsuas ntawm qhov deb thiab kev hloov chaw hauv lub metric system yog dab tsi? Lus teb: Ob qho tib si ntsuas ua meters (m).

6. Puas yog qhov kev hloov chaw tuaj yeem yog qhov tsis zoo? Lus teb: Yog. Qhov kev hloov chaw tsis zoo qhia tias qhov kev taw qhia yog qhov tsis sib xws rau qhov kev taw qhia zoo uas tau xaiv.

7. Qhov deb thiab kev hloov chaw sawv cev li cas hauv daim ntawv vector? Lus teb: Qhov deb yog qhov ntau scalar thiab tsuas muaj qhov loj xwb. Kev hloov chaw, ua ib qho vector, muaj ob qho tib si qhov loj thiab kev coj.

8. Yog tias ib tug neeg taug kev 10 meters mus rau sab hnub tuaj thiab tom qab ntawd 10 meters mus rau sab hnub poob, tag nrho qhov deb uas taug kev thiab tag nrho qhov kev hloov chaw yog dab tsi? Lus teb: Qhov deb = 20 meters; Kev hloov chaw = 0 meters.

9. Qhov kev hloov chaw xoom qhia txog dab tsi? Lus teb: Nws qhia tias qhov chaw pib thiab qhov chaw kawg yog tib yam.

10. Puas muaj peev xwm ua tau rau ib yam khoom txav mus los yog tias nws qhov kev hloov pauv yog xoom? Lus Teb: Yog. Ib yam khoom txav mus rau hauv lub voj voog kaw lossis txoj kev rov qab mus rau nws qhov chaw pib, ua rau xoom qhov kev hloov pauv.

11. Yuav suav qhov ceev nruab nrab li cas? Lus teb: Qhov ceev nruab nrab = Tag nrho qhov deb mus ncig / Tag nrho lub sijhawm siv.

12. Yuav suav qhov ceev nruab nrab li cas? Lus teb: Qhov ceev nruab nrab = Tag nrho qhov kev hloov chaw / Tag nrho lub sijhawm siv.

13. Qhov tseem ceeb ntawm qhov kev taw qhia ntawm kev hloov chaw yog dab tsi? Lus teb: Qhov kev taw qhia ntawm kev hloov chaw pab nkag siab txog kev taw qhia ntawm kev txav mus los ntawm qhov pib mus rau qhov kawg.

14. Peb yuav ua li cas qhia txog kev hloov chaw hauv kev txav mus los ib-seem? Lus Teb: Hauv kev txav mus los ib-seem, kev hloov chaw tuaj yeem sawv cev los ntawm tus nqi zoo lossis tus nqi tsis zoo, nyob ntawm qhov kev taw qhia xaiv.

15. Yog tias muaj ib yam khoom pov rau saum ntuj thiab rov qab los rau tus neeg pov, qhov kev txav chaw yuav yog pes tsawg? Lus teb: Qhov kev txav chaw yuav yog xoom vim tias qhov chaw pib thiab qhov chaw xaus yog tib yam.

16. Qhov loj ntawm kev hloov chaw puas tuaj yeem loj dua qhov deb uas tau mus? Lus teb: Tsis tau. Qhov loj ntawm kev hloov chaw tuaj yeem sib npaug lossis tsawg dua qhov deb, tab sis yeej tsis loj dua.

17. Lub ntsiab lus siv los txiav txim siab qhov kev hloov chaw yog dab tsi? Lus teb: Lub ntsiab lus siv los txhais qhov chaw pib uas suav qhov kev hloov chaw.

18. Yog tias lub tsheb mus ncig ua kab ncaj nraim li 50 mais thiab rov qab mus rau nws qhov chaw pib, nws qhov kev hloov pauv yog pes tsawg? Lus Teb: Qhov kev hloov pauv yog xoom.

19. Qhov ntev ntawm txoj kev hauv cov ntsiab lus ntawm kev txav mus los yog dab tsi? Lus teb: Qhov ntev ntawm txoj kev yog lwm lo lus rau qhov deb uas tau mus ncig.

20. Koj yuav paub qhov txawv ntawm qhov deb thiab qhov hloov chaw li cas los ntawm daim duab? Lus Teb: Hauv daim duab graph, qhov deb yeej ib txwm sawv cev los ntawm ib daim kab uas tsis txo qis, thaum qhov hloov chaw tuaj yeem sawv cev los ntawm ib daim kab uas nce, txo qis, lossis nyob ruaj khov, nyob ntawm qhov kev taw qhia ntawm kev txav mus los.

21. Puas yog ib yam khoom yuav tsum txav mus los thiaj li muaj kev hloov chaw? Lus teb: Tsis yog. Ib yam khoom muaj peev xwm hloov chaw yog tias nws qhov chaw hloov, txawm tias nws tsis txav mus los rau ib ntus.

23. Yog tias tag nrho txoj kev uas ib yam khoom npog yog nkhaus, qhov kev hloov chaw puas tseem yog qhov luv tshaj plaws ntawm cov ntsiab lus pib thiab xaus? Lus teb: Yog, qhov kev hloov chaw yeej ib txwm yog qhov deb ntawm cov kab ncaj nraim ntawm cov ntsiab lus pib thiab xaus.

24. Hauv qhov xwm txheej twg qhov deb thiab kev hloov chaw tuaj yeem muaj tib qhov loj? Lus teb: Thaum ib yam khoom txav mus rau hauv ib txoj kab ncaj nraim yam tsis hloov nws txoj kev.

25. Ib yam khoom puas muaj qhov ceev tas li thiab qhov ceev hloov pauv? Lus teb: Yog, yog tias yam khoom txav mus rau hauv txoj kev nkhaus ntawm qhov ceev tas li, nws qhov kev taw qhia (thiab yog li ntawd qhov ceev) hloov pauv, tab sis nws qhov ceev tseem tas li.

26. Qhov deb thiab kev hloov chaw muaj feem cuam tshuam li cas rau lub sijhawm? Lus teb: Qhov deb thiab kev hloov chaw, thaum faib los ntawm lub sijhawm, muab qhov nruab nrab ntawm qhov ceev thiab qhov nruab nrab ntawm qhov ceev, raws li.

27. Puas yog ib yam khoom qhov deb ntawm ib qho chaw nce ntxiv thaum nws qhov kev hloov chaw tseem ruaj khov? Lus teb: Tsis yog. Yog tias qhov kev hloov chaw tseem ruaj khov, qhov chaw ntawm yam khoom piv rau qhov chaw pib yuav tsis hloov, yog li qhov deb ntawm qhov chaw ntawd yuav tsis nce ntxiv.

28. Kev hloov chaw puas yog qhov ntau ntawm scalar lossis vector? Lus Teb: Kev hloov chaw yog qhov ntau ntawm vector.

29. Vim li cas peb thiaj tsis ntxiv qhov deb ncaj qha kom tau txais qhov tshwm sim zoo li kev hloov chaw? Lus teb: Vim tias qhov deb tsis muaj kev taw qhia, nws tsuas yog sawv cev rau qhov loj xwb. Kev hloov chaw muaj ob qho tib si qhov loj thiab kev taw qhia, yog li lawv tuaj yeem ntxiv vectorally.

30. Hauv kev txav twg qhov kev hloov pauv sib npaug rau qhov ncig ntawm lub voj voog? Lus teb: Hauv kev txav ncig, yog tias ua ib qho kev tig tag nrho, qhov deb sib npaug rau qhov ncig, tab sis qhov kev hloov pauv yog xoom. Tsuas yog tias qhov kev txav mus los npog ib nrab ntawm lub voj voog, qhov kev hloov pauv (ib txoj kab ncaj nraim hla lub voj voog txoj kab uas hla) yuav sib npaug rau lub voj voog lub voj voog.