Totally lost in AP Physics!?
958930
A=25 (just pick two points on a graph and substitute them into the formula, for example 3.5 = A* sqrt (0.02))\n\nFor work done: W=F*x=A*x^3/2\n\nThe work done is just the area underneath the graph at any given poin for a particular value of x
127894
I can probably help u with it....I am in grade 10, skipped grades 9...reasonably good at Algebra and Trig, Geomerticaly retarded though T,T"\ndamnedatheist@gmail.com can help u
901641
Someone posted the exact same set of questions a few days back, either here or on the physics page - you ought to be able to find the methods in the responses. Have a look.\n\n\nBest of Luck - Mike
111044
I'm just doing all your work aren't I?  Its ok I like physics, and its good practice.  I am studying for the MCAT coming up this April (Med School).  This problem unlike the other ones that I did is a little more tricky to me.. Mostly because I don't have my physics textbooks with me.  But it would appear that you need to calculate the acceleration that is exhibited on the foot when it hits the ground.  The way I approached this problem is by using vf^2 = vi^2 + 2ad  and I solved for acceleration.  Knowing that the final velocity is zero I isolated acceleration to get and acceleration of -1024 m/s^2!!! thats huge isn't it.  that is why I'm uncertain about this problem... anyways, multiplying that using the F =ma equation I got a total force of 9216N.  But after inspecting the inital velocity its got to be right because if you convert 6.4 m/s into km/hr you get 23.04 km/hr!!! This person must be falling of a building or something!  So there it is.  Afterall didn't the question start out saying that injury can happen!?
551366
1)Get your concepts right..coz iit questions r one of a kind. they cant be found ny where else.. so you gotta be hundred percent sure bout u r concepts\n2)Think outta d box. say for example,you r attemting a physics question like 'wat will happen if a ball with velocity xm/s hits a bullet with velocity ym/s', then u must not only solve d prob, but also think bout other possibilities like wat will happen if it takes place in space,etc.\n3)work hard-in the right direction. dont waste u r time in problems which involve large and tedious calculations .Dont work out d same type of probs over and over again, instead work out a few quality sums which involve logical thinking.\n4)Start early, Beat d competition.So the earlier u start , d the better r ur chance of winning.\n                 So,gud luck pal
848001
Look up Vector Mechanics for Engineers and Scientists.  This deals with basic Newtonian physics as applied to static structures.\n\nBone up on chemistry.  It is easy to forget your chemistry, and as far as I know you will be required to take a few semesters of basic Chem, even if you are not planning on being a Chem Eng.\n\nDo not lose your Maths either!  Grab a pre-calc or a calculus book and keep practicing.
574012
I've alread answered two of your questiions in my last answer....\n\nIn this one, the guys above are correct - however, I'd try working it out for myself if I was you. Your tutor will soon realise something is wrong if you are giving answers to a subject you don't understand. Read the chapter, ask you teacher if you need more help. Learn Newtonian mechanics for yourself.
757859
haha, k  Draw a picture and draw a free-body diagram.\n\nI don't feel like busting out a paper/pencil  so I'll try it in my mind\n\nF(sub g) cos Theta  =  Mg cos(20 degrees)\n\nbecause the Normal force is equal to the y-component of gravity.\n\nTwo similar triangles, the incline and one which has the Force of gravity straight down, and the y compentn equal opposite of the normal force, and X component equal opposite to F\n\n\nlots of physics i'm skipping in my explanation tho
1101085
It's been quite a while since I took AP History. From what I remember it was challenging, but not the hardest AP class I took. I don't do well with dates either. I'm better at remembering trends and general concepts about events than the exact date they occurred. I passed with a high enough score to earn credit at most colleges, but not the highest score possible. \nI'd think AP physics would be more difficult. I have a harder time with numbers than with words. Maybe you aren't the same, but it's much easier for me to write an essay like AP History requires, than to grind out abstract mathematical equations. Also, depending on what you want to study in college the classes may not transfer and you might have to take them again.\nI think AP History is an easier course to transfer than Physics. For example, several Medical Schools require college level Physics for entry but won't accept AP Physics. \nI also think it would be easier for you to find like minded students to study Physics with in a college environment rather than a high school one.\nNow the case FOR Physics: If you can handle the demanding schedule you have planned and do it well, it would look fantastic on your college applications!\nBest of luck!
609611
Dear amit.wizkid, thou little knoweth what an abysmal error thou maketh.\n\ntut_einstein, you are better off noting that the sum of the first 'n' terms of an AP, whose first term is 'a' and the difference between terms is 'd' is :\n\nS = (n/2)[2a + (n-1)d]\n\nYou state that \nS1/S2 = (n+1)/(n+3)\n\nwhich is \n\n[2a1 + (n-1)d1] :[2a2 + (n-1)d2] = (n+1) : (n+3) ..... (I)\n\nRemember that what you desire to know is\n(a1 + 5d1) : (a2 + 5d2) \n\nPut n = 11 in (I)\n\n[2a1 + 10 d1] :[2a2 + 10 d2] = 12:14\n\nwhich gives\n\n[a1 + 5d1] : [a2 + 5d2] = 6:7\n\nwhich is what you desire. \n\nShould suffice.
502732
Let me guess you're taking the AP Calc test tomorrow!  Me too!  :)\n\nWell first take the seperate derivatives of x and y\nto get dx/dt and dy/dt\n\nthen put you dy answer over the dx answer to have dy/dx\n\nthen take the derivative of dy/dx and put that over your dx/dt\n\n\nexample problem\nx=5t^2                 y=4t^3\n\nsolution:\n\ndx/dt= 10t       dy/dt= 12t^2\n\ndy/dx (first derivative) = (12t^2)/(10t)\n\nwhich equals (6/5)t\n\nthen take d(dy/dx)/dt (derivative of (dy/dx))\n\nso that equals (6/5)\n\nthen put that over dx/dt which is 10t\n\nso (6/5)/(10t) which equals 6/(5*10*t)\n\nso answer equals 6/(50t)\n\n\nHope it helps and if you are taking the AP Test good luck!!!
823034
You can find a good summary here:\n\nhttp://www.sparknotes.com/testprep/books/sat2/physics/chapter12section2.rhtml
172574
AP Physics is phun, dont let anyone tell you otherwise.\n\nFirst, find the volume of the balloon.\nThe volume of a sphere = 4/3 pi * r^3\nyou are given the radius, so this should be no problem.\n\nOnce you know the volume of the balloon, find how much Helium and air it would take to fill it.\nYou could do this two ways, (the Physics way or the Chemistry way) either by using the molar masses of the gasses....or using the densities of the gasses, the density way is probably easier, but you either need to have those given to you or you can look them up and assume what temperature the experiement is taking place at.\nYou need to find the masses of each of the gasses.\n\nThe lifting force of the balloon will equal the difference in the upward and downward forces acting on it.  The downward force is the force of the Helium's weight, the upward for is the weight of the air that the balloon is displacing (we ignore the weight of the ballooon).\n\nIf you want to believe wikipedia,\nthe density of air at 20 degrees C = 1.204 kg/m^3,\n\none mole of Helium = 4.00 grams.\nAt STP 1 mole of Helium would have a volume of about 22.4 Liters.
617628
Ignore the answerer above. Learning physics can be tough.\nSolve as below:\n\nu=30m/s\nv=0\na = -6m/s^2\n\nusing v=u+at\nt=(v-u)/a\nt=(0-30)/(-6)\nt=5 seconds is the answer
799487
Alright... physics is fun if you get the right problems :) .  \n\nThe collision is elastic... your book should have a conservation of momentum equation.  It states that p1+p2 = Ptotal\n\nYou have to use component vectors for the velocity after the collision.  A good thing to do would be to draw the problem.  It would make it a lot easier.  So use conservation of momentum.\n\nAnd there are two equations that would really help you:\n\nFinal velocity of block A= ((MB-MA)/(MA+MB))*VAinitial\n\nFinal velocity of block B= ((2MA)/(MA+MB))*VAinitial\n\nHelp with physics:\n\nALWAYS draw pictures epecially on your exams.  Get on the good side of the professor, go to a tutoring center if you have one, do many problems and memorize how to do the basic ones if you want an A on the test.
434567
If you got a B+, then all you should need to get is an A- to get in the 'A' family - the upward trend should show you improved over the term. Other than doing extra credit (as you noted), I'd cover those things that gave you trouble and find a different way to learn them - maybe use some flash cards for vocabulary terms. But strive for your "usual" A+ this term to give yourself a buffer.\n\nBut you didn't provide any other specifics - what specific branch of science are you learning? Are you comfortable in the lab? If you're taking chemistry, you will want to be adept at algebra for problem solving and balancing chemical equations. If you're taking physics, you'll need to know some geometry and trigonometry (as well as some algebra) for force and trajectory problems. But if you're still calling it by the generic name "science," then that tells me you're probably in junior high - at least you have some fair warning for high school science classes.\n\nOverall, though, don't get overly concerned about your grades - it's more important to *learn* something that you can take out of these classes. If you get an occasional B or B+ but learn a lot, you're going to have an easier time in college than those who work just to get A's.
299247
understand da basic concepts.if u hav difficulty understandin them ,get help frm a tutor o ur skol teacher.then, do practice papers & study da theories a LOT!good luck...