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Tuesday, June 26, 2007
June is almost ending, so, I decided to finally write here what I should: the steps!
These are only based on my understanding of it, so blame me not if it's not that uber correct.
GRAPHICAL METHOD:
[Not that accurate but is waaay easier.]
1. Choose a scaling for your measurements. e.g., 10 m = 1 cm
2. Draw whatever was instructed on the given problem.
3. Connect the tail of the first vector to the head of the last.
4. Measure the last line drawn and convert it using the scale chosen. For the angle, use a protractor.
COMPONENT METHOD
[Is more accurate but makes your head bleed.]
1. Using the appropriate SOH CAH TOA equation, find the x-component and the y-component for each vector.
3. Add up both x-components, (one from each vector), to get the total of x-component.
3. Add up both y-components, (one from each vector), to get the total y-component.
4. Add the total x-component to the total y-component, then use the Pythagorean theorem to get the size and direction of the total.
5. To get the angle, use the formula... theta = tan-1 (Ay/Ax).
P.S. Well, it always is easier said than done. Knowing the steps plus a scientific calculator at hand doesn't really guarantee you a perfect score on a quiz... So, I guess I'm saying goodbye for now.Labels: Required Post
posted by Karen Ann Labsan at 5:19 AM
... DROP DEAD ...
Wednesday, June 13, 2007
In my first post, I wrote here about SOH CAH TOA and all that Physics stuff. Now, here I am to tell you some more about a first -first quiz, first zero.
Okay, it's not really so bad, but it still is bad, though. I mean, only one person scored! How bad is that?!?
With that, it seemed like nobody really got the lesson and that a lot of us freaking don't know what the heck Sir Mendoza was talking about. No it's not Sir Mendoza's fault, and no it also isn't ours, and neither is it my scientific calculator's. I think it's whoever-thought-of-making-life-more-complicated-with-random-numbers-and-equations-ending-up-with-Physics' fault.
Anyways, what the suckiest part of it all is that for 10 minutes or so, we worked our butt off to come up with, at least, an answer that our scientific clculators showed us. I mean, won't there be like any credit for that? 5 orn 0 is just damn unfair!
P.S. At least, our last year ComSci teacher, Sir Casba, gave a point or two for the effort! To Sir Mendoza: A point or two for almost-there answers won't really hurt. :)Labels: Just So I Have an Update
posted by Karen Ann Labsan at 6:23 AM
... DROP DEAD ...
Sunday, June 10, 2007
So, what the heck do I really have to write in here?
I'm supposed tobe blogging about our Physics class and all... Ok, I'll try.
Since this is the first week of classes for this year, I wasn't really expecting a heavy workload as early as now. But, what the heck! Sooo much homework! Crap.
Anyways, we had our first lesson in Physics -SOH CAH TOA. It's not really addition-subtraction easy but I understood it eventually. Also, I'm not really a big fan of scientific calculators so I had trouble with the function buttons at first. But, least i know already what to press to get what i need to!
So, highlight of Physics classes this week, for me... Knowing what SIN, COS, TAN are there for in my scientific calculator.
Also, meeting the Physics teacher, Sir Mendoza. lol :)
posted by Karen Ann Labsan at 2:41 AM
... DROP DEAD ...
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