Recent content by ManishR

i hate competition too. i don't like the idea of comparing two people , when they think totally different and why you are comparing how they think just based on few variables. what good it does ? i don't understand this oversimplification of such a complex event. competition means less...

thank you so much tiny-tim.

oh i misunderstood kinetic energy i used to think that ke of m = (mv2)/2 v is speed between m and the other object(s), which is fixed in two body system , but not fixed in three body or more (which distance to take). just to make sure (so i don't misunderstand it again) if...

just to make sure you know that m_{A}\frac{d^{2}}{dt^{2}}\overrightarrow{r_{A}}=\overrightarrow{F_{A}} right ?

in general its postional vector (thats how i defined it so far) and (so) in two body case its \overrightarrow{r}=\overrightarrow{r_{B}}-\overrightarrow{r_{A}} r1 - is initial value r2 - is final value

let me tell what i mean by potential energy of an object. lets consider postional variable \overrightarrow{r}. (\overrightarrow{r} has to defined, before using it) P.E. of an object from \overrightarrow{r_{1}} to \overrightarrow{r_{2}} =...

earlier you said that kinetic energy of m_{A} from \infty to r = -G\frac{m_{A}m_{B}}{r} \Rightarrow\frac{1}{2}m_{A}v(r)^{2}=-G\frac{m_{A}m_{B}}{r} but i said its not, as i have proved earlier \frac{1}{2}m_{A}v(r)^{2}=-G\frac{m_{A}(m_{A}+m_{B})}{r} according your formal...

no. its not. \left.\frac{1}{2}m_{A}v_{0}^{2}\right|_{v_{0}(\overrightarrow{r_{0i}})}^{v_{0}(\overrightarrow{r_{0f}})}=\left.G\frac{m_{A}(m_{A}+m_{B})}{r_{0}}\right|_{\overrightarrow{r_{0i}}}^{\overrightarrow{r_{0f}}} then distance between center of mass of system (of A and B) and center...

let say i want to know the potential energy of m_{A}due to m_{B}. then according to above defination, P.E.=-G\frac{m_{A}m_{B}}{r} where r is distance between m_{A}and m_{B}. if this is potential energy then it cannot be equal to difference of kinertic energy of m_{A} from \infty to r ...

How do i do that ? What is formal definition of potential energy ? i think have not understood potential energy yet

i have gone through many books (and studied few of them) but i have not seen anything like m_{A}(m_{A}+m_{B}). am i doing something wrong here (quite sure) or was there some hidden assumption that i did not get.

EDIT 1 (More Mathematical Version)...

hello tiny-tim :) let me show you how i derive potential energy of A due to B. (note there are just two objects A & B now)...

consider object A with mass m_{A}and inertial positional vector \overrightarrow{r_{A}} object B with mass m_{B}and inertial positional vector \overrightarrow{r_{B}} object A with mass m_{C}and inertial positional vector \overrightarrow{r_{C}}...

what do you think about IGNOU ?