<p>its physics in calculus class with integrals.</p>
<p>These are about the simplest integrals (well, except for functions like f(x) =0) you will ever see! If you cannot handle these, I would seriously advise you to drop the course.</p>
<p>well that is true b/c in this case acceleration is constant. But later u will see things that change. For example, changing force, changing energy and even CHANGING MASS(rockets).</p>
<p>I'm taking physics right now. The problems we're doing are so unrealistic. Frictonless, massless pulleys, ignoring air drag, etc. etc. I just can't wait for all that cool stuff!</p>
<p>what physics r u in? massless pulleys will suddenly become pulleys with mass that have rotational inertia. Air drag, well we learned it, but it isn't as major as the other stuff.
Friction is quite easy. all u do is sigma f= blah blah. Anyways i'm in AP physics C if u r curious about what we r doing.</p>
<p>I'm in first year AP Physics C. I was exaggerating a bit, this stuff was from about a month ago. But we still haven't done pulleys with mass or friction.</p>
<p>really? i can't believe u didn't cover friction and pulleys yet. Hmm r u doing E&M at the same time? that might explain a little.</p>
<p>Nope. Kinematics this term, EM next. </p>
<p>We have done friction, just not on pulleys.</p>
<p>hmm u guys r going awfully slow then i have to say. What r u covering? we're doing rotational momentum and yoyos right now. kind of interesting i never thought rolling would be that complex in terms of velocity. It's rotation + movement which makes things intersting.</p>
<p>We're doing that too. We have done vectors, velocity/acceleration, projectile motion, circular motion, Newton's laws, KE, work, power, potential and mechanical eneregy, momentum, center of mass, impluse, collisons, and now rotations.</p>
<p>yeh that seems about right. i guess we're exactly on track. hey r u at Exeter? i'm curious how u jumped from geometry to calc BC although i know that, well not to denigrate anything, math whatever level in American public schools is easy.</p>
<p>Close, Andover. What about you?</p>
<p>well i go to a public school in fairfax county virginia. It's not good as andover of course, but it's much better than korean public schools i used to go until junior year.</p>
<p>thanks mathwiz. im beginning to overlook the simple things again.
Quick! Whats 13 x 14? No calculator!</p>
<p>...Rube Goldberg!</p>
<p>140 + 30 + 4* 3 = 182
math is funnn..:)</p>
<p>I did it by: 13<em>10 + 13</em>4 = 182.</p>
<p>I'm not understanding your logic, haith.</p>
<p>I know that 13*13 is 169, so I just added 13 to that...</p>
<p>haha, math dorkiness..
thats ok, i used to love math. ill be honest- calc is the first time i havent been easily acing math, and i dont like it.
also, im wondering how you jump into physics c right away, and not take a yr of physics first. i took a yr first, and i still find c pretty challenging.</p>
<p>Check it knavish. Ill show you another example. lets say...17<em>15.
Take 17 and add a 0 to the end = 170. then, take the 5 from 15 and add a zero = 50. Now, add 170 to 50 and you get 220. next, take 7</em>5 = 35 and add to 220 = 255. Thus, 17<em>15 = 255.
For 14</em>13 I just did 14 + 0 at end = 140 + 3 + 0 at end = 170 + 4*3 = 182. Took all of about .2 seconds in my head :)
Btw this only works up to but not including 20x20</p>
<p>17<em>15 can also be found this way. 17</em>15 = (16+1)(16-1) Right? Thus 16^2 - 1^2 = 17*15 = 255. This also takes like .2 secs in the head :)
Anyone else know any good mental calculation tips?</p>