hindi ako elmo, ok?
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Friday, June 22, 2007

My Expectations in PhysicsPhysics is indeed a really hard subject. With complicated formulas, weird equations plus the schedule. Our time in physics is two to three in the afternoon, its time for sleeping and it'll only make physics class really boring. But I wont talk about how boring it is or it'll be. There are so many solutions to make physics time fun and exciting, and i expect that to happen. Using strategies is one solution (and I hope our teacher has one). I expect our teacher will also be a friend to us, whom we can share our problems, encourage us when we're down and teach us verry g0ood. I hope he has a long patience and considerate heart. When he teach, I expect physics to be fun.

**brEak dancE n0t hEarts**2:54 AM
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Thursday, June 21, 2007

Vector Addition Using Components
Given two vectors u = (u1, u2) and v = (v1, v2) in the euclidean plane, the sum is given by:
u + v = (u1 + v1, u2 + v2)


For three-dimensional vectors u = (u1, u2, u3) and v = (v1, v2, v3), the formula is almost identical:
u + v = (u1 + v1, u2 + v2, u3 + v3)

In other words, vector addition is just like ordinary addition: component by component.
Notice that if you add together two 2-dimensional vectors you must get another 2-dimensional vector as your answer. Addition of 3-dimensional vectors will yield 3-dimensional answers. 2- and 3-dimensional vectors belong to different vector spaces and cannot be added. These same rules apply when we are dealing with scalar multiplication.


**brEak dancE n0t hEarts**5:45 AM
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Graphical Addition
Consider the vectors u = (3, 4) and v = (4, 1) in the plane. From the component method of vector addition we know that the sum of these two vectors is u + v = (7, 5). Graphically, we see that this is the same as the result we would get by "picking up" one of the vectors (without changing either its direction or its magnitude), placing its end at the other (unmoved) vector's tip, and drawing an arrow from the origin to the new tip location for the displaced vector.

This geometric procedure for adding vectors works in general. For any two vectors u and v in the plane, the sum of the vectors is graphically given as in the following figure:

The geometric procedure is valid for 3-dimensional vectors as well. Notice that in the same way that any two lines lie in a plane, any two vectors in 3-dimensional space will also lie in the same plane. This recognition allows us to see that the sum of two vectors will always lie in the plane defined by the original two vectors.
As we noted in vector addition, in order to subtract one vector from another, you simply add its negative partner: u - v=u + (- 1)v. Thus, vectors can be subtracted graphically in the same manner used for adding them, by simply taking care to reverse the direction of the vector being subtracted:

If you graphically add back in the subtracted vector to your result from the subtraction and you recover the initial vector you subtracted from. In other words, (u - v) + v = u in our graphical methods.

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**brEak dancE n0t hEarts**5:45 AM
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rEyziLLe


About

Reyzille Joy Illazar
ang walang kamatayang peace sign.hehehe.
14 yrs old
December 7, 1993

 Likes

Fall Out Boy, Panic At The Disco
Harry Potter, The Chronicles of Narnia
Pink, Green, Black, Blue

 Dislikes

Gray, Orange
POSERS/POSEURS
Physics

 I'd like to say something...

I love the things I love because I love them and not because MY FRIENDS love them. I don't love something because EVERYONE loves it. I don't love something just because it's popular or it makes me look good to everyone's eyes. Do you know who I think I am? No. You don't.

So if I come to love you it's because I do and not because my friends do.

GET IT?

So if I were you, I would express myself as I am and not as what my friends are. (oha, oha, english un!!! ang tagal kong pinag-isipan kung tama ba ung grammar). Anyway, you, whoever you are if you're like this, a poser (as what hope says), please change. Don't be a clown for Pete's sake! Stop hiding your true feelings! If your happy, stay happy. If your sad, be sad. If you don't like something, then don't be afraid to tell the whole world you don't. DON’T LOVE SOMETHING JUST BECAUSE IT’S POPULAR OR JUST BECAUSE IT MAKES YOU LOOK GOOD TO EVERYONE’S EYES. I think that's very stupid.

I guess what I'm trying to say is, I HATE POSERS.

In case your wondering what I mean by poser...

poser
noun
1. a person who habitually pretends to be something he is not [syn: poseur]



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