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Се дефинира вектор во просторен координатен систем и операции со векторите. Definition of a vector and operations with vectors

Правоаголен просторен координатен систем

Три бројни оски кои се нормални меѓу себе образуваат правоаголен тродимензионален координатен систем и определуваат тродимензи­онален простор кој накратко се нарекува простор.

Слика 1.1. Просторен координатен систем
Едната оска се нарекува x -оска или апсциса , втората е y -оска или ордината и третата е z -оска или апликата . Точката O која е пресек на оските се нарекува координатен почеток. Секоја точка M во троди­мен­зио­налниот про­стор е наполно определена со подредената тројка реални броеви x , y , z кои се нарекуваат нејзини коорди­нати, односно М ( x , y , z ).

Секој пар координатни оски определува рамнина нарече­на координатна рамнина .

Во просторниот координатен систем се определуваат 3 координатни рамнини:

xOy координатна рамнина (определена со x -оската и y -оската);

xOz координатна рамнина (определена со x -оската и z -оската);

yOz координатна рамнина (определена со y -оската и z -оската).

Секоја точка M ( x , y , z ) која лежи на некоја од координатните рамнини или оски има координати:

област координати
xOy рамнина ( x , y , 0)
xOz рамнина ( x , 0, z )
y О z рамнина (0, y , z )
x - оска ( x ,0, 0)
y - оска (0, y , 0)
z - оска (0, 0, z )

Со координатните рамнини тродимензионалниот простор се дели на 8 делови наречени октанти . Знаците на координатите на произволна точка по октанти се:

О ктант З наци на координати
I x > 0, y > 0, z > 0
II x < 0, y > 0, z > 0
III x < 0, y < 0, z > 0
IV x > 0, y < 0, z > 0
V x > 0, y > 0, z < 0
VI x < 0, y > 0, z < 0
VII x <0, y < 0, z < 0
VIII x > 0, y < 0, z < 0


Постојат величини кои се определуваат само со бројна вредност, додека други, освен со бројна вредност се определуваат уште и со правец и насока.

Дефиниција . Величините кои се определуваат само со бројна вредност се нарекуваат скалари .

Дефиниција . Величините кои се определуваат со бројна вредност, правец и насока се нарекуваат вектори .

Скаларни величини или накратко скалари се на пр. температурата, плоштината, должината и др. и тие се наполно определени со нивната бројна вредност. Затоа доволно е да се каже дека температурата на воздухот е 20 0 C, плоштината на некоја геометриска слика е 20 cm 2 , должината на отсечка е 5 m и тн.

Брзината е векторска величина и како таква е определена со бројна вредност, правец и насока. Затоа брзината со која дува ветерот се определува со бројната вредност на пр. нека таа е 5 m/s, во правец север-југ и во насока од север кон југ.

Слика 1.2. Вектори
Векторот геометриски се претста­вува со ориентирана отсечка т.е. дел од права ограничена со две точки од кои едната е почетна а другата е крајна. Векторот меѓу точките А и B , од кои А е почетна а B крајна точка се означува со AB size 12{ { ital "AB"} cSup { size 8{ rightarrow } } } {} (Сл. 1.2.). Освен ова означување, за векторите се користат и малите букви одозгора означени со стрелка на пр. a , b . . . size 12{ {a} cSup { size 8{ rightarrow } } ,` {b} cSup { size 8{ rightarrow } } "." "." "." } {} или пак со мали задебелени букви на пр. а , b .

Според дефиницијата за вектор, секој вектор се дефинира со:

- интензитет (должина или модул) на вектор е растојанието помеѓу почетната и крајната точка на векторот и се означува со

AB , AB ¯ , a size 12{ \lline { ital "AB"} cSup { size 8{ rightarrow } } \rline ,`~ {overline { ital "AB"}} ,`~ \lline {a} cSup { size 8{ rightarrow } } \lline } {} ;

- правец на векторот е правецот кој го определува правата на која лежи векторот и правата се нарекува носач на векторот;

Questions & Answers

does psychology deal with love?
Mohammed Reply
Maybe, i think
I definitely would say yes
how so
there are so many different reasons why you can fall in love with someone, many of them develope subconsciously -> psychology
love messes with the brain, a lot, ergo I believe that Psychology does indeed deal with love
what is synapse
Katie Reply
In the central nervous system, a synapse is a small gap at the end of a neuron that allows a signal to pass from one neuron to the next. synapse are found where nerve cells connect with other nerve cells
can you do auto book auto
Mariah Reply
WHT u mean?
heyy, may i join the conversation please?
edem Reply
who is the father of psychology
Richy Reply
and please, how would you guys, describe the study of psychology at college ?
psychologist student?
i mean not yet but am about to start college so wanna know how is it(college in general and psychology course) please
Psychology is the study of mind and behaviour. So if you will take psychology as a subject so you will get to know how your everything (physical, mental, social, spiritual aspects) effects your behaviour
With this brief knowledge you can help people to cope up with their problems and only you can guide them correctly
And if you go for further specialisations you can study hypnosis, face reading, body language etc
Thanks a lot🙏🏾 And ik some of the stuffs u said but i am also going to write thesis, right ?
ok no prob, thanks a lot🙏🏾✨
hae everyone, hope you are well this evning my question is what is the difference between drive and motivation
good question
drive is more like an impulse or urge and i think they both go together (drive and motivation) even if there is a slight difference
@ Michael Drive is delivered to be innate without the use of an external stimuli, motivation normally evolves an outside stimuli which may include praise, appreciate, or reward.
*believed...sorry for typo
@Reginald, can't the motivation come from the inner self?
Good question, please give an example.
can we say desire of success for example
Wilhelm Wundt is the father of psychology
Wilhem Wundt thank you for the road that you opened.
You mean who is the father of having a great educated argumentative guess? nothing is more wrong than this question. The question is you should ask yourselfs is, how sure are you abour their scientific studying? one's percieved assimilated approach to judging another person and saying they are
the biggest problem with scientific research and data is that ya you could get the same result 1000 times then it could go the other way 1000 times, but we would never know that and we did, we would still say ya but the proof is there. The only thing science proves is that humanity has
no facts about human behavior in the scientific context, but more in the trial and error.. sorry to tell you, but so far no one has proven Father of anything, thats up to you and i, judgement is bias, science is good enough lazy
cognitive development is the growing and development of the brain.
Jessy Reply
Anyone knows about Techno-fascism?
Hussein Reply
Ecofascism is a theoretical political model in which an authoritarian government would require individuals to sacrifice their own interests to the "organic whole of nature". The term is also used as a rhetorical pejorative to undermine the environmental movement.
what's the big difference between prejudice and discrimination?
Danice Reply
A prejudiced person may not act on their attitude.  Therefore, someone can be prejudiced towards a certain group but not discriminate against them.  Also, prejudice includes all three components of an attitude (affective, behavioral and cognitive), whereas discrimination just involves behavior
Nancy Lee
what is all about cognitive development?
cognitive development is the growing and development of the brain
how do you control a variable when using spss whilst running a pearsons correlation analysis?
Jessie Reply
it dependa on your study. according to what you want to say and explain your result
why does it say her and she
Jayla Reply
stages of cognitive development
brivia Reply
sensory preoperatinal concrete formal
what is psychology
Chethani Reply
the study of insecurities and the effect on the host .
Psychology is the scientific study of behavior & mental processes
psychology is science about learning human behaviour
In thinking about the case of Candace described earlier, do you think that Candace benefitted or suffered as a result of consistently being passed on to the next grade?
Nene Reply
what is reward
Angeles Reply
reward is a technique to change behaviour
Reward is a way to promote a specific behaviour or to teach someone/ something to behave a specific way or perform a specific task.
a reward is something that is usually associated with desirable behavior. The child got a reward for winning the game. A reinforcer is different in that a reinforcer is anything that increases behavior, even if it is increasing an undesirable behavior.
reward is earned effort realized
why heroine addicted people smoke heroine in a dirty and polluted place ?
Najeem Reply
/i don't know
I believe they don't wanna be seen
Rajendra Singh I'm asking from those who know thanks for your comment
Ruphine it's not a scientific answer
more my personal opinions and experiences than a real answer but more of an answer than the question marks
what's the data or fact that actually say that heroine smokers host in dirty and polluted place.
Generally the more time an addict is using and the harder they use the more their life and everything around them crumbles. it's quite common to find neat respectable clean users but over time the addiction increases and their health declines along with their ability to keep up day to day duties.
I'll see if I can find some links for you to have a read.
hi. as heroine affedted exactly on the brain, it should be because the chages heroine makes on frintal lobe and sensory and motor parts. after a while the cannot behave in a normal way. in a way heroine ruines the neurones
The things said in the thread are some of the most horridly presumptuous & unwarrantedly pretentious statements I've read in my entire life. It's distastefully disrespect, to say the least.
Pouran Hi! thanks for answering I'm agree with your opinion and may the answer be the same
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Source:  OpenStax, Векторска алгебра. OpenStax CNX. Mar 11, 2009 Download for free at http://cnx.org/content/col10672/1.3
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