June 2006 - Physics

Test Preparation SAT Subject Test Preparation
421

<p>hm... alright, I think I'm wrong. It is tangential acceleration that increases.
<a href="http://en.wikipedia.org/wiki/Non-Uniform_Circular_Motion%5B/url%5D"&gt;http://en.wikipedia.org/wiki/Non-Uniform_Circular_Motion&lt;/a&gt;&lt;/p>

<p>I don't understand how radial acceleration (v^2/r) is constant though. Isn't velocity increasing?</p>

422

<p>The magnitude of velocity, i.e., the speed is constant however the direction of the velocity is constantly changing. It is because of the changing direction that the velocity changes ( even though magnitude is constant ). This is because velocity is a vector..</p>

423

<p>In a non-uniform circle, I thought the speed of the ball gets greater?
I know that in a uniform circle, the speed of the ball is constant and the velocity only changes with respect to direction.</p>

424

<p>I remembered the question on the test to be related to a uniform circle..My bad..</p>

425

<p>let's first try to remember what EXACTLY the question was...anyone?</p>

<p>did it say that the speed increased?</p>

426

<p>just wondering, what does PR stand for?</p>

427

<p>princeton review, dude!</p>

428

<p>my 800 is unrealistic now lol unless the test is curved 2-3 points as in lyk a 61 is a 800 :)</p>

429

<p>800 is unrealistic for me now too. :(</p>

430

<p>the PR curve is set at 60 isn't it?</p>

431

<p>Maybe I'll get 780 or 790?</p>

432

<p>I think if I get above 750 I wont retake !...This waiting is a killer !!</p>

433

<p>Hey guys, we rock! We're the nerdiest on this board. XD The Physics SAT II thread is the only one that's still being visited and updated, haha. ;)</p>

434

<p>
[quote]
Hey guys, we rock! We're the nerdiest on this board. XD The Physics SAT II thread is the only one that's still being visited and updated, haha.

[/quote]
</p>

<p>Na... There's the World History thread too.. lol</p>

435

<p>well dont compare physics with history ..please !:p</p>

436

<p>Which problems do people have questions about? I think I know all of the answers, but I don't feel like going through all 2784 pages of this thread.</p>

437

<p>1) the tangential/radial force problem
2) which point on the wave is moving up (B or D?)</p>

438

<p>2) D (10char)</p>

439

<p>Did any1 else get 4eV for one of the questions? It was one of the last questions and actually took a while so did you all skip it?</p>

<p>Also, many of you have said that insects cannot be fractals. But what about insects with repeating patterns (e.g. butterflies and caterpillars --see <a href="http://www.moonsinger.com/fractals&creationbutterfly.htm)%5B/url%5D"&gt;http://www.moonsinger.com/fractals&creationbutterfly.htm)&lt;/a>. Please explain how the air one could be the answer.</p>

440

<p>I dont even know what a fractal is... The review books didnt state that it would be tested.... Which chapter would fractals fall under?</p>