<p>from all my physics and math experience, it has to be 3 in my eyes. everyone else seems to agree on 6rad2</p>
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<p>wait… the rocket question was 2 seconds, right?</p>
<p>Yes, magnet is 6root2.
I also took physics and the question involves a force formula in the mechanics unit. They give questions about changing the distance all the time.</p>
<p>it is based off the physics equation force = mass x g1g2 / radius^2. if you substitute g1 and g2 for 1, then youll have 1/r^2. If you want the force between the two to double, you will have 1/4, meaning your final answer will be 1/4th of the original distance of 12, or 3. correct me if/where im wrong</p>
<p>i thought it was three, i was just all like, inverse squared formula! totally physics. basically if the bar was 3f at a distance, double the distance away would be 12f. thus when it came forward halfway, it was 3f</p>
<p>i loved the complicated question you had to make a system of equations with a and b and solve with -2/5 and 10 i think</p>
<p>@mets try it out. Plug in 12 to the equation. You get 1/144 force/newtons You need to double that by adjusting the distance. Now plug in 3, you get 1/9. 1/9 is not twice of 1/144. </p>
<p>If you double 1/144 you get 1/72. So 72=d^2, answer is root72 or 6root2</p>
<p>@smfmets18
Physics formula:
Electrostatic force = Electrostatic Constant * charge1 * charge2 / distance^2</p>
<p>Keeping the charges the same and constant the same, if you want to double the force, you need to cut the distance^2 in half. 12^2 = 144
144/2 = 72.
Therefore new distance^2 must equal 72.
Square root 72 and you get 6root2.</p>
<p>(Edit | Look at all of us using the physics formula haha.)</p>
<p>didn’t it ask for the force when it was half the distance?</p>
<p>what was the answer to the a^-x question, I put increasing from 0 to 1 then decreasing i think</p>
<p>i got 1 second using my graphing calculator. i set the 2 equations equal. the seond equation was y=32 or 36.</p>
<p>@Noxsing
I believe you might have read it wrong… I think iIt asked for the distance when it was half the force.</p>
<p>what do you guys think -4 will be? any chance of a 33 or 34 there? i thought this math section was really hard, definitely much harder than april</p>
<p>I don’t know i think it was half the distance, and on the a^-1 one i put always decreasing because when it is say 1/2, the negative makes it -1/2 so if say 2=a and 2^(-1/2) it is less then a at .707. and when it is say 2 the negative makes it -2 so if say 2=a and 2^(-2) it is less then a at .25. The negative makes it always decrease, since a>1 i believe</p>
<p>Ugh I kept thinking 12 was the height for the Cone volume problem… Hopefully -2=35 at this point</p>
<p>arghhhhhhhhhh I had to pee so bad i couldnt concentrate at all at the end of test and missed the a^-x, there goes the 36</p>
<p>there was a question that said something was being sold for $1.49 each, and for a pack of three it was $3.90. Find how much you save on one when you buy three. If you multiply 1.49 by 3 you get 4.47, then subtract 3.90 you get $.57, but that wasn’t a choice.</p>
<p>praying for -1 = 36. I know that I only missed one question… please please please</p>
<p>@chillin
on april i got 4 wrong and still got a 34 on the math</p>
<p>lets hope everyone else did exceedingly horrible and we get a 36=-2, 35=-4, 34=-6 curve</p>