+Ab0uT me+


NAme: Julie Anne M. Cabuhat
Nicknames: Jana/ Julie...and others.
Birthday: 07/17/92
Age: 14
School: Masci
Currently in: high school
Section: Proud Darwinian :D

+Expectations+

[learn new things in physics

[get a high grade in this subject *sana lng*

[ apply what i have learned in this subject in my everyday routines

+Old books+

June 2007
July 2007
August 2007

Saturday, June 23, 2007

I almost forgot, sir mendoza asked us to put the steps on the analytical and
graphical method of getting vectors on our blogs.

So before i forget, here it is:
Component Method
1. To add vector B to vector A, first draw A on a piece of graphing paper
to some scale, such as 1 cm=1 m, and so that its direction is specified
relative a coordinate system.
2. Then draw vector B to the same
scale with the tail of B starting at the tip of A.
3. Vector B must be drawn along the direction that makes
the proper angle relative
vector A.
4. The resultant vector R = A + B is the vector drawn from the
tail of A to the tip of B.

Graphical Method
1. Consider a vector A in a rectangular coordinate system.
A can be expressed as the sum of two vectors: Ax, parallel to the x-axis;
and Ay, parallel to the y-axis.
2. From the definitions of sine and cosine, we see that
cos
= Ax / A and sin = Ay / A, so the components of A are Ax = A cos
and Ay sin. These components form two sides
of a right triangle having
a hypotenuse with magnitude A.

3. To solve for the angle , which is measured from the positive
x-axis by convection,
we can write it in a form: = tan-1 ( Ay / Ax ).

So that's that, til next week!
~toodles!:D

[jana[ rants about physics at 4:29 AM

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