Recent content by rasensuriken

hmm...but i think the book should be more or less accurate...i quote this from the book "Mechanics" by L.D.Landau...i do have the same opinion as yours when i am reading this...But considering Born2bwire's i think the statement is alright, since the Lagrangian is T-U, in which the potential...

I came across this from a book saying that: If all the co-ordinates and velocities are simultaneously specified, it is known from experience that the state of the system is completely determined and that its subsequent motion can, in principle, be calculated. Mathematically, this means that, if...

Thanks a lot! I think i get it now...so i shouldn't confuse the term energy and force...

Well i known this is a kinda fundamental property of mechanics but i always have a weird thinking about this law. Let me illustrate my trouble with an example. Let's say i kick a ball with force F? According to the Law the ball experience F force, and my leg experiences -F. My questions...

May i know why do we radiate? As in what mechanism actually happening that caused us to radiate em wave?

ya...i also just thought of that...the acceleration is not constant...because the L/2 relative to the center of mass keep on changing...thanks!

The question is as the attachment... May i know if i want to find the angular speed of the rod when it inclined at certain angle, or at horizontal, can i use the \varpi^2=\varpi_0^2+2\alpha\vartheta? Attempt: I used it, and used conservation of energy, the latter produces right answer, but i...

Thanks vietdao29. Ya i can go from there...I am a form 4 student studying integration on my own. Hope these can help me in form 5 and form 6.

Math experts please come! b]1. Homework Statement [/b] Calculus, integration Homework Equations http://img341.imageshack.us/img341/6091/questiontc3.jpg The Attempt at a Solution used method:changing variable, by part, trigo etc but no avail.:confused: Please help me solve it...