<p>i think i'm pretty screwed for the exam...i got a raw score of 18.75 out of 34 (1998 mc). </p>
<p>does anyone know how the grading works? i think the frqs are out of 15...so 45 points there...and you create a proportion for the MC so it's out of 45, but what's the cutoff for a 5, a 4, 3, 2, & 1?</p>
<p>are there any good prep books i can study from...that may save me? i have wed + thurs + fri + sunday to study</p>
<p>oh...and does anyone know how to solve this problem:</p>
<p>The equation of motion of a simple harmonic oscillator is d2x/dt2 = 9x, where x is displacement and t is time. The period of oscillation is...??</p>
<p>Thanks.</p>
<p>Hey, I've been looking for a practice MC to do before Monday's test. My teacher doesn't have any, since he only teaches the B curriculum, and I can't find any online. I would greatly appreciate it if you could send me a copy of the 1998 MC. Thanks a lot!</p>
<p>lol everyone in my class including me is gonna get a 1.</p>
<p>i'm hoping for a 4 or a 5...a 5 would be preferred...b/c my waitlist school only accepts 5, but a 4 will give me credit to where i'm enrolled.</p>
<p>George.. the question is for simple harmonic oscillation since for a spring F = -kx and newton's second law is F=ma..
-kx=ma
a = -(k/m)x
d^2x/dt^2 = -w^2x, since a is double deriv of x, omega (w) = sq root(k/m)</p>
<p>so in the eq you gave w^2 =9, w = 3 = 2pi/T.
T = 2pi/3</p>
<p>In 2004 you only needed 49 points out of 90 for a 5. :o)</p>
<p>yay! so 49-25 = 24 points needed for the frq..not to shabby</p>
<p>what about for a 4?</p>
<p>Here's the scoring from 2004</p>
<p>5: 55-90
4: 43-54
3: 32-42
2: 21-31
1: 0-20</p>
<p>hmm my teacher had a different sheet than that...it said 49 for a 5 in mechanics and 45 for a 5 in E & M...</p>
<p>he collected the sheet back up so I don't know the other ranges.</p>
<p>what's the best way to start studying? i have the basic concepts all down....and I can do easy problems...not sure about hard problems...</p>
<p>What book do you find to be the most effective? Anyone want to study with me?</p>
<p>I feel pretty screwed for the Physics C tests (using the barron's book). Right now I'm staying home to bone up on APUSH. If you want to study just AIM me at neurosis737.</p>
<p>for phys C mechanics, you need to get about a 24+ raw score on MC and 30/45 on the free response and you are guarunteed a 5 on the exam
for phys C E&M, you need to get about a 22+ raw score on MC and 30/45 on the free response and you are guarunteed a 5 on the exam
...this comes from my AP Phys C teacher who has been teaching the course for a long time and has scoring sheets for a bunch of the exams, so its a reliable source</p>
<p>^That's the same as what my teacher told my class. Getting a 5 is not too difficult with the monster curve.</p>
<p>mellohappy, i think thats the scores for 2002. The curve has gone up and down, but im expecting the curve to be low this year (as in a harder test). lets see if im right, hmmm?</p>
<p>if its a harder test shouldnt curve be higher?</p>
<p>Yeah it should. sriharifez, what makes you think this year's test will be harder than usual?</p>
<p>My final from some time ago listed 63/90 as the needed score to get a 5. This was from the mid to late 1980s, however. It seems the curve has gotten even larger now.</p>
<p>its cuz we're stupid (haha)...does anyone know whether you can use a formula chart on part I of the exam (both e/m and mech)</p>
<p>^ i don't think so</p>
<p>You can only use the formula sheet on the free response.</p>