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Tegnologie

Graad 9

Meganismes en beweging

Module 1

Meganismes en beweging

Inleiding

Wat is ’n meganisme?

  • In ons alledaagse lewe word ons deur meganismes omring. Hulle help om ons lewens op baie maniere makliker te maak. Die meeste van die meganismes wat jy gebruik, is so bekend dat jy nooit daaraan dink nie. Eenvoudige dinge soos deurknoppe, ligskakelaars, onderdele vir jou fiets en jou pa se motor is slegs enkele voorbeelde. In die verlede, in ou masjiene soos stoomenjins, was die meganismes maklik om te sien. Vandag word dit agter panele en bedekkings versteek. Meganismes maak dit vir ons moontlik om eenvoudige dinge te doen soos om ligte aan te skakel, krane oop te draai en met jou fiets teen die bult uit te ry. Jy sal die gebruike van verskillende meganismes ontdek namate ons dit in hierdie module van naderby bekyk.

Aktiwiteit 1

  • Maak ’n lys van items wat na jou mening voorbeelde van meganismes is. Sketse en prente van hierdie items kan ook ingesluit word.
LU 1.2

Meganismes en beweging

  • Meganismes kan gebruik word om die spoed, rigting of krag wat nodig is om iets te doen, te verander. Meganismes kan jou help, maar kan dinge nie op hulle eie doen nie. Hulle het energie en iemand of iets nodig om hulle te laat werk. Die energie wat deur ’n masjien gebruik word, word die inset genoem. Die gevolg van die energie-inset word die lewering genoem. ’n Meganisme soos ’n fiets kan met die diagram hieronder verduidelik word.

Aktiwiteit 2

  • Verduidelik die voordele van kettingratte en kettings wat op fietse gebruik word.
LU 2.3
  • Meganismes hou met beweging verband. Daar is vier hooftipes beweging. Dit kan geïllustreer word met behulp van ’n mens se liggaamsbeweging.

Aktiwiteit 3

  • Noem die tipe beweging wat deur die produkte geïllustreer word. Gebruik pyltjies om die rigting van die beweging aan te dui.
LU 2.3

Tipes meganismes

Meganismes word almal in masjinerie gebruik. Daar is vyf tipes meganismes:

  1. Hefbome , wat dit moontlik maak om kragte op presiese punte toe te pas.
  2. Katrolle , wat die rigting en spoed van ’n beweging verander en toelaat dat krag oorgedra word.
  3. Ratte , wat ’n draaibeweging en -krag oordra.
  4. Nokke en krukke , wat eenvormige insetbeweging in nie-eenvormige leweringsbeweging omskep.
  5. Skroewe , wat ’n draaibeweging in staat stel om ’n lineêre krag oor te dra

Aktiwiteit 4

  • Beantwoord die volgende vrae op grond van die prentjies A-F.

  1. Noem die meganismes van A tot F.
  2. Stel ’n gebruik vir meganisme A voor.
  1. In B, roteer as nr. 1 teen 10 rpm. Hoe vinnig sal as nr. 2 roteer?
  1. Op watter manier kan meganisme C gebruik word?
  1. In D, as W kloksgewys roteer, hoe kan jy V anti-kloksgewys laat roteer?
  1. Skets ’n speelding wat meganisme F kan gebruik.
LU 2.3

Assessering

Leeruitkomstes(LUs)
LU 1
TEGNOLOGIESE PROSESSE EN VAARDIGHEDE Die leerder is in staat om tegnologies prosesse en vaardighede eties en verantwoordelikheid toe te pas deur gepaste inligtings- en kommunikasietegnologie te gebruik.
Dit is duidelik wanneer die leerder:
ondersoek:
  • bestaande produkte wat toepaslik is vir ‘n geïdentifiseerde probleem, behoefte of geleentheid met betrekking tot ‘geskiktheid vir doel’, ontleed;
LU 2
TEGNOLOGIESE KENNIS EN BEGRIP Die leerder is in staat om relevante tegnologiese kennis te verstaan en dit eties en verantwoordelik toe te pas.
Dit is duidelik wanneer die leerder:
strukture:2.1 kennis en begrip toon van strukture:
  • eienskappe van materiaal wat die funksie daarvan in strukture affekteer (bv. massa, hardheid, styfheid, veerkragtigheid, weerstand teen korrosie, sterkte in spanning, samepersing, skuifwerking);
  • ontleding (geen berekeninge nie) van die uitwerking van verskillende laste (gelyke/ongelyke, statiese/dinamiese);
stelsels en beheer:2.3 deur praktiese analise, kennis en begrip van interaktiewe meganiese sisteme en subsisteme demonstreer en sulke sisteme en subsisteme met diagrammatiese sisteemdiagramme voorstel:
  • ratstelsels;
  • band gedrewe of katrolsisteme met meer as een stadium;
  • meganiese beheermeganismes.

Memorandum

AKTIWITEIT 1

  • Leerders kan enige produkte lys wat hulle as meganismes beskou. Die doel met die aktiwiteit is om die leerders te laat besef hoeveel produkte eintlik meganismes is. Bespreek die voorbeelde met die klas.

AKTIWITEIT 2

  • Groter kragte kan oorgedra word
  • Kettings gly nie
  • Kettings kan uitmekaar gehaal word om verwydering moontlik te maak

AKTIWITEIT 3

  • Deurhandvatsel Ossilerend (handvatsel) en heen-en-weer-bewegend (resiproserend)
  • Kraan Roterende beweging
  • Lugpomp Ossilerend
  • Skêr Ossilerend

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
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Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
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Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
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Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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Source:  OpenStax, Tegnologie graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11070/1.1
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