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Graad 5

Ontdek strukture

Module 10

Inleiding tot strukture


Enige voorwerp is ‘n soort struktuur . Slaan in die verklarende woordeboek na wat die vetgedrukte woord beteken en skryf dit neer.

Opdrag 1

Wat is die nut van strukture?

Voltooi : (Kies uit die volgende moontlikhede: brug, ‘n kamer, mandjie, kartondoos vir appels, boekrak)

‘n Struktuur: a) bevat dinge, bv. _ en/of

b) beskerm dinge, bv. _ en/of

c) ondersteun dinge, bv. _ en/of

d) omsluit ‘n ruimte, bv. _ en/of

e) strek oor ‘n afstand, bv. _

[LU 2.1]

‘n Huis is ‘n struktuur wat al bogenoemde funksies verrig. Dit bevat meubels, beskerm jou en jou besittings wat daarin bly, ondersteun die dak, omsluit ruimtes en strek oor ‘n afstand.

Opdrag 2

‘n Struktuur moet sy eie gewig en die las wat dit moet dra, kan ondersteun en nogtans sy vorm behou. ‘n Las kan ‘n voorwerp, ‘n persoon of ‘n krag wees. Wat is die las in elk van die volgende voorbeelde?

[LU 2.1]

Opdrag 3

Hoe kragte op strukture inwerk

Watter invloed oefen kragte op strukture uit?

  1. Dit _ voorwerpe beweeg.
  2. Dit _ dat voorwerpe beweeg.
  3. Dit verander die _ van beweging.
  4. Dit verander die _ van beweging.
  5. Dit verander die _ van voorwerpe.

[LU 2.1]

Opdrag 4

Die uitwerking van kragte kan nie altyd gesien word nie.

Wat veroorsaak die hoofkragte wat op dele van strukture werk? (Kyk by Opdrag 2)

  1. Die _ wat op die strukture geplaas word.
  2. Die _ van die struktuur self.

[LU 2.1]

Opdrag 5

Watter twee kragte werk op strukture in?

  1. __ pers ‘n deel van ‘n struktuur saam deur te probeer omdie kante nader aan mekaar te druk.
  2. __ rek ‘n deel van ‘n struktuur deur te probeer om deleuit mekaar te trek.

Ons sê ‘n deel van die struktuur is in 'n _ of _ toestand.

Pale word saamgedruk, of is onder druk.

Die mure van die huis word saamgedruk, of is onder druk.

Die kettings van die swaai word getrek, of is onder spanning.

Die lang ketting en die twee kort skakels op hierdie uithangbord word getrek, of is onder spanning.

[LU 2.1]

Opdrag 6

Kragte wat op ‘n struktuur inwerk, kan die dele van die struktuur laat meegee

of vervorm. ‘n Deel se weerstand teen vervorming hang af van

a) die _ waarvan dit gemaak is,

b) sy _

c) sy _

d) en die _ waarop jy dit probeer buig.

Strukture moet _ , _ en _ wees sodat dit nie inmekaar stort of omval wanneer jy ‘n las daarop plaas nie.

[LU 2.1]

Opdrag 7A

Kom ons ondersoek die vertikale sterkte van dopstrukture:

Opdrag aan die opvoeder:

Verdeel die klas in groepe. Deel aan elke groep ses A4-manillas van dieselfde dikte uit, asook ‘n blik met los spykers en ‘n plat stuk dik karton van 10 cm by 10 cm.

Opdrag aan elke groep:

Vou elke manilla soos wat in die sketse verduidelik word sodat dit ‘n blik met spykers daarin kan ondersteun. Ondersoek elke manier en besluit watter struktuur die swaarste las kan ondersteun. Die hoogte van jul struktuur moet die breedte van die manilla wees. Julle mag die manilla vou en op vyf plekke met maskeerband plak. Elke stuk maskeerband moet 5 cm lank wees. Die plat stuk dik karton moet op die struktuur geplaas word met die blik spykers bo-op. Kyk watter struktuur die meeste spykers kan ondersteun. Maak ‘n regmerkie by die skets van die struktuur wat die swaarste las kan ondersteun.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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