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Tegnologie

Graad 7

Stelsels en beheer: water

Module 9

Ontwerp ‘n waterwiel

ONDERSOEK

Probleemsituasie

Jy moet ‘n hoeveelheid drukspykers oor ‘n afstand van 60 cm oplig. Jou kragbron is 4 ℓ water wat 1,5 m bo die rotor verskaf word in ‘n 3 mm plastiekpyp.

Ontwerpbeperkings

Die materiaal wat jy mag gebruik, is enige van die volgende:

Vir die rotor:

  • ‘n kurkprop of
  • twee kartonsirkels met 20 cm deursnee of
  • ‘n leë garingtolletjie

Vir die as:

  • twee tandestokkies of
  • ‘n breinaald of
  • ‘n 15 cm spyker of
  • ‘n lang ronde potlood of
  • ‘n sosatiestokkie

Vir die lemme:

  • twee eierdosies waarvan die bakkies uitgeknip word of
  • dik karton of
  • ‘n leë 2 ℓ plastiek koeldrankbottel waaruit die lemme geknip word of
  • ‘n plastiek margarienbakkie waaruit die lemme geknip word of
  • plastiek teelepels of
  • plastiek roomysskeppers
  • Voorbeelde van waterwiele:

Vir die staander:

  • ‘n liniaal met draad wat aan die as aan weerskante vasgemaak word of
  • ‘n stuk hout met tou wat aan die as vasgemaak word of
  • ‘n leë 2 ℓ plastiekbottel waarvan die bodem afgesny is of
  • ‘n groot plastiek sapbottel of
  • ‘n 2 ℓ melkbottel

Om die waterbron te verskaf:

  • ‘n beker wat in ℓ afgemerk is
  • ‘n 1,5 m lange 3 mm in deursnee plastiekbuis aan ‘n tregter vasgemaak

Om die water op te vang: ‘n groot plat plastiekkom/ bak

Om die drukspykers op te lig (die hystoestel):

  • dun tou of
  • wol
  • ‘n plastiek of platoppervlakbakkie vir die drukspykers
  • ‘n ogie

Ander gereedskap:

  • ‘n skêr
  • wondergom
  • klei
  • kleeflint
  • ‘n mes
  • gom
  • waterdigte verf en vernis
  • ‘n verfkwas
  • ‘n krammasjien
  • ‘n potlood
  • ‘n liniaal
  • ‘n stilus
  • ‘n gradeboog (vir plasing van lemme)

Opdrag 1:

Om ‘n situasie te analiseer

LU/AS 1.5

Kom ons analiseer /ontleed die situasie en skryf ‘n ontwerpvoorstel neer. (‘n Ontwerpvoorstel is ‘n kort stelling wat ‘n moontlike oplossing omskryf.)

Voltooi die volgende:

Ek gaan ‘n ontwerp en maak wat ‘n hoeveelheid

oor ‘n afstand van ± cm vertikaal kan oplig deur van die gepaste materiaal

en gereedskap wat genoem word, gebruik te maak.

Ontwerp

Opdrag 2:

Om navorsing te doen oor hystoestelle en turbines

LU/AS 1.4

Doen navorsing oor hystoestelle (katrolle) en turbines (waterwiele) en teken of plak prente van bestaande of antieke masjiene. Verduidelik ook kortliks hoe hulle gewerk het. (Vind bv. uit omtrent die Egiptiese sjadoef of die waterwiele van Archimedes)

Watter naslaanbronne het jy geraadpleeg?

Opdrag 3:

Om navorsing te doen

LU/AS 1.2

Soms kan jy ‘n probleem dadelik oplos deur van jou reeds verworwe kennis en verbeelding gebruik te maak. Om egter die beste moontlike oplossing te verkry, benodig jy nuwe kennis en inligting wat jy slegs deur navorsing kan opdoen. Raadpleeg ‘n verskeidenheid naslaanbronne en teken met byskrifte in die spasie hieronder moontlike oplossings vir jou probleem.

Opdrag 4:

LU/AS 1.7

Daar is sekere ontwerpbeperkings wat jy in ag moet neem, aangesien jy slegs sekere materiale en gereedskap mag gebruik. Dit is dus nodig dat jy spesifikasies moet skryf, want daar moet spesifieke besonderhede omtrent jou ontwerp wees waaraan voldoen moet word.

Jy moet moontlike oplossings vir die probleem oorweeg deur al jou idees op papier te teken. Oorweeg verskillende ontwerpe. Deur jou idees te kombineer met die navorsing wat jy gedoen het, behoort jy ‘n goeie oplossing te vind.

Questions & Answers

what is the meaning of function in economics
Effah Reply
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Isaac Reply
Is the degree to the degree of responsiveness of a change in quantity supplied of goods to a change in price
Afran
Discuss the short-term and long-term balance positions of the firm in the monopoly market?
Rabindranath Reply
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Afran
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Anteyi Reply
A firm is a business entity which engages in the production of goods and aimed at making profit.
Avuwada
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So how is the perfect competition different from others
Rev Reply
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1
Naziru
what is the difference between short run and long run?
Ukpen Reply
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Anna
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Ukpen
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Ada
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Ukpen
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Docky
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Docky
Okay and I was being serous
Anna
The short run is a period of time in which the quantity of at least one inputs is fixed...
Anna
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Anna
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salihu
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Suraj Reply
It will creates rooms for an effective demands.
Chinedum Reply
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babsnof
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eshita
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Suraj
Economics is a science which study human behavior as a relationship between ends and scarce means which has an alternative use.
Mr
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babsnof
what is different between demand and supply
Debless Reply
Demand refers to the quantity of products that consumers are willing to purchase at various prices per time while Supply has to do with the quantity of products suppliers are willing to supply at various prices per time. find the difference in between
Saye
Please what are the effects of rationing Effect of black market Effects of hoarding
Atty Reply
monoply is amarket structure charecrized by asingle seller and produce a unique product in the market
Cali Reply
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Niraj
I want to know wen does the demand curve shift to the right
Nana
demand curve shifts to the right when there's an increase in price of a substitute or increase in income
kin
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kin
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Nana
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freshwater
the Law of supply: states that all factor being equal, when the price of a particular goods increase the supply will also increase, as it decreases the supply will also decrease
kin
@Nana the factor that changes or shift the d demand curve to the right is 1) the increase in price of a substitute good or commodity 2) increase in income
kin
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kin
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Nana
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Ada
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Cali
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Anthonia
define an apportunity cost?
Cali
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Cali
In a simple term, it is an Alternative foregone.
Sule
opportunity cost is the next best value of a scale of preference
Akiti
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Nelly
opportunity cost: is a forgone alternative
kin
Monopoly is where is one producer produces a given product with no close substitute
James
what is income effect?
Qwecou Reply
if you borrow $5000 to buy a car at 12 percent compounded monthly to be repaid over the next 4 year what is monthly payment
Nitish Reply
Researchers demonstrated that the hippocampus functions in memory processing by creating lesions in the hippocampi of rats, which resulted in ________.
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The formulation of new memories is sometimes called ________, and the process of bringing up old memories is called ________.
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Source:  OpenStax, Tegnologie graad 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11031/1.1
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