<p>i don’t know how i misread that question then…</p>
<p>For the feild lines question doe anyone remember what they put? I chose D which was the second row on the right side.</p>
<p>All of your others i agree w/ except i was also confused w/ the elevator one, according to my brother it would be a diagonal line up but he didn’t see the question</p>
<p>yea berger that’s it</p>
<p>Lightbulbs question, if i recall correctly it was A,C,D,F. The ball in the elevator was the parabolic path one, it has a velocity component up and a horizontal component to the right, causing an acute angle and a parabolic flight path, projectile motion basically.</p>
<p>For the elevator one, I put the parabola option. Doesn’t gravity make the ball fall to the ground (relative to the building)? I thought this since the elevator didn’t create a force on the ball, so it was a standard projectile motion map</p>
<p>For the elevator, it might be a hook (up then down) cuz of gravity; im not sure though</p>
<p>For the elevator one, is it just the same path as if the elevator weren’t moving (parabola) because the laws of physics are the same for all inertial reference frames? Or did I over think it? Yeah I think that’s wrong because it asked for relative to the building. </p>
<p>Also, for the mirror and the screen, anybody get 30 cm from the mirror? And what did people get for when convex(I think) hits plane mirror. I said it switch from convex to concave or concave to convex- no clue though?</p>
<p>I point the option where it was just bending downward as if it were simply thrown off of a building horizontally, is this the parabola option you guys are referring to?</p>
<p>Yes for 30 cm. The other one was a convex wave hitting a plane mirror, I put it would strike back as a concave wave relative to the mirror</p>
<p>you sure about the concave thing relative to the mirror?</p>
<p>What did you guys put for adding weights to the circular motions questions. For the first, was it increasing speed, and for the second, it was increases frequency right?</p>
<p>No but it was my best guess, If you sort of draw it out, the convex wave is a arc that would have a (i think) center of curvature to the side of the plane mirror, as it bounces off, the center of curvature would then shift towards the opposite side, making it (I think) a concave wave, relative to the mirror</p>
<p>For the circular motion question, wasn’t it increase in speed and increase in frequency for both? Since R is the same, wouldn’t an increase in speed translate into an increase in frequency? </p>
<p>Yea what the hell was the difference between adding weights and simply replacing those weights with a new mass</p>
<p>an increase in frequency would make sense, since the period decreases. 1/f = T</p>
<p>I don’t remember this question to well thesox, why is it that made the period decrease</p>
<p>Anyone know the answer to the one with the drawing of the boat with the waves behind it, it asked what did the waves say about the boat’s speed?</p>
<p>I also don’t remember this well but I think period decreases since the velocity/speed increases and the circumference decreases.</p>