Recent content by airforce840

For our AP Physics final project, we must do research on the moment of inertia ... which by that we are looking at a trebuchet's arm design, and also just trebuchet analysis(looking at the body of the trebuchet and how it will need to be for best performance with an arm of certain design). We...

My group is to teach a lesson to our AP Physics class on a lesson from our book. We got lesson 92, which deals with Viscous Fluids, Surface Tension, and Elastic Properties of Solids. Since there's 3 people, we each got one and lucky me got surface tension. I have to be able to discuss this...

i figured out most of it.. but i confused my self on this because there's 2 ways to do it. the 1st equation to t and then sx.. and u get this t= -vi sin(feta) +- Square root of vi sin (feta) - 4(-sy) / 2 and if i use the other one.. its more complicated i think sx= vi(-vi...

uh... is there sumthing else that means S because I've never seen Sx before.. lol other than that i kinda understand and yes..windresistance is always ignored in our class.. i don't know why but our teacher will not go into it

Suppose that a projectile is launched from an initial height yi with an initial speed Vi and it strikes a target at a fianl height yf and fianl position xf. Show that the proper launch angle (feta symbol) is given by feta = tan^-1 [xf +/- Square root of Xf^2 - 4k(k-Delta y) / 2K] where K...

i feel so stupid.. these problems are quite easy once i looked at it again.. all i got to do is use m C delta T and I am good 2 go.

I am having a lot of trouble with these types of problems.. this one is on a homework assignment and i don't know where to begin. heres the problem : The sepcific heat of lead is 31.0 calories per kilogram per Celsius degree. (a) Find the heat necessary to raise the temperature of 1.30 kg of...

C= Q/V Q's units will be coulombs V's units will be volts C's answer will be farads 1 coulomb/ 1 volt = 1 farad so basically how you have explained the problem it would seem that you just need to plug and chug the answer into the equation. it seems that how your numbers are though...

so how would i set this problem up? and thanks for the hint.. i didnt learn that in class so i added it to my personal notes :smile: the way i think I am supposed to set this up is distance .21 m times 1.012x1065 x 850 kg/m cubic .. I am thinking the density may be throwing me off though..

This is a problem i have in my homework and i want to learn how to do these and get them right so please don't just give me an answer lol The desity of the fluid in a tube is 850 kg/m cubic. THe pressure exerted by the atmospher is 1.013x10^5 Pa. What is the pressure P in the container...

Thanks 4 the Help I got to class and had some more explanation... i wish in class they would be as blunt and understandable though... only thing i still have a problem with is like.. trying to find the vectors part..the directions.. like q1 q2 q3 q4...

ok... here's a sample prob. actually its the one I am on.. 1. Three point charges, q1, q2, and q3, lie along the x-axis at x=0, x=3.0 cm, and x= 5.0 cm, respectively. Calculate the magnitude and direction of the electric force on each of the three point charges when q1= +6.0 mu symbol C...

We are dealing with Coulombs law or w/e in Physics right now AND I DONT GET IT lol In my homework. it gives numbers like +6.0 (weird u symbol)C and i jus don't understand how to find the magnitude and direction of everything.. Im a junior in Physics..so someone of higher...