<p>
[quote]
34: force = mg(3/5)+mg(4/5).3= **42<a href="mg(4/5)%20=%20normal%20force">/b</a> **C*
[/quote]
</p>
<p>^^^yea, i got same answer (42) but for some reason i wrote C instead of B. hopefully, i don't do that on the AP test :rolleyes:</p>
<p>i feel stupid...for not seeing the 42....i apologize</p>
<p>here is a weird MC from one of my practice tests...</p>
<p>Gauss's Law can be used to conveniently find the electric field around which of the following object EXECT</p>
<p>a) large plate
b) sphere
c) cube
d) long solid rod
e) long hollow cylinder</p>
<p>cube because you can't draw a surface where the flux is uniform.</p>
<p>how come for the gravitation question, its D and not B?</p>
<p>^ it's a -1/r function</p>
<p>SCREW PHYSICS, seriously. I'm planning on getting a 1, not even exaggerating (we get 100 on the final for taking it so that's the ONLY reason I'm taking it).</p>
<p>I am ridiculously screwed....ah well. Good luck everyone, tomorrow</p>
<p>Does anyone have the answers to the 98 released mc answers? I just did the test, but I have no way to check my answers. Can anyone PM me or send it to spikezz at gmail ? Thank you so much.</p>
<p>The 98 mechanics I mean.</p>
<p>ah i see, cube is annoying as far as flux - no sym.</p>
<p>but for a plate, how can you do it?</p>
<p>nvm, just make a guassian surface infintesmally wider than the plate to "sandwich" it and then use qin/e0</p>