<p>so i saw that barron's curve makes the whole score out of 100, and going by that i got a 2 on a practice test..however, going by the curve posted here on CC (which is the same for actual CB tests), i'm just a couple points below a 4</p>
<p>i'm hoping that the CC/CB curve is the correct one right?</p>
<p>oh and for math/science AP tests, on the free response, if we get part a wrong, but all our answers to b,c,d, etc. are from our wrong answer from a, we can still get full credit for b,c,d if they're calculated correctly? i think that's why the graders have calculators on hand </p>
<p>thanks in advance guys</p>
<p>^ does ne1 have experience w/ barrons and can compare its curve to the real thing?</p>
<p>Yes, we get partial credit for doing the right thing with the wrong value. So, if there’s a question where parts b, c and d need a value from a and you have no idea how to find it, just make up some random number.
For physics, remember to write out the formula before plugging in values (my class got a nice lecture from our physics teacher about that :P)</p>
<p>thanks muscovy</p>
<p>so wut’s the comparison of barron’s curve to the real one? and difficulty-wise…</p>
<p>Can any1 explain about frictional, perpendicular forces and parallel forces…and solving for each one in an inclined plane problem.</p>
<p>@Muscovy don’t just make some random number, make up something with a solid idea (either write down a plausible equation or do some dimensional analysis) you never know and might just get it right!</p>
<p>@reloadedxp:</p>
<p>Given a block of mass M on an inclined plane of elevation x degrees, the forces perpendicular to motion are the Normal Force (which is Mg(cos x) facing upwards) and the vertical component of the gravity (Mg(cos x) facing opposite the Normal force. The forces parallel to the motion are the horizontal component of the gravitational force (Mg(sin x) towards the declining side) and possibly the friction force, if it exists, in the direction opposite to motion. Friction force is (Normal Force) x (Friction coefficient).</p>
<p>But that’s really really basic physics. Are you sure you’re ready to attempt the AP test?</p>
<p>camemil: Oops, “educated guess” is a better term - of course it’s a bad idea to randomly insert 60kg for the mass of a soccerball :P</p>