Recent content by manuka

jbriggs444, Thanks for help, but it do not click. about truck... what if we talk about shots fired at a deer for example. Bl=light bullet; mass 1kg, velosity 100km/h Bh=heavy bullet; mass100kg, velocity 1km/h so moments are equal, but KE is different (and the difference is huge). 1...... Bl...

Will this statement be true? Momentum is a measure of how much FORCE is needed to stop an object. Kinetic energy is a measure of how long(TIME) an object can resist to a stopping FORCE. It's like this analogy: Car Engine size is like a momentum, while fuel tank is like kinetic energy. The...

well I've seen this formula KE = P2 / 2m But... it does not click. You know I've been struggling with concept of FORCE and momentum for some time and it clicked like this: Once you face a problem of mesuring motion then you undestand that Newton was right and MxV is a great definition. Then...

yep. Friction acts on it... and... well... emmm... and I push it... So friction Force and Push force will cancel out. I understand. But THE EQUATION :) ... Oh, i got it. Are you telling me that here: Ft=m(v1-v0) F-should be the SUMM of all forces :) , and not only one of many...

two days of searching and reading and still i can not comprehend these concepts. what i know: 1)momentum is vector and energy is scalar. Well it gives no intuition to me. 2)i know that Force x dTime is change of momentum. This really make sence. 3)i know that Force x dDistance = KE This makes...

Well, how should I put it. At the first post i gave an example of inverted pendulum. "State" there is a word which describes position of a pendulum here. One is stable the other is unstable. It is clean and simple model. But it lacks desired dynamics: i can not find an objective function for the...

thanks i'll look at it. but about your "What you have asked for is logically inconsistent." statement... does the example with "wolf foraging" is inconsistent too? could you explain a little bit more. Or do you think this example does not undergo "optimal switching between states" at all...

thanks.> I've never seen this one. funny thng. but that is not in my list! :) Maybe i would hint others about such systems. The ONE i can imagin is: Wolf foraging. Wolf sits "stable" in one area(patch) where game is plentiful, but when pray becomes scares he should move to other patch of...

Hi. I would appreciate if some one could help me with my question. But first some background: There is a classical problem of inverted pendulum under control. Pendulum can be put to UNSTABLE equlibrium and (if no control applied) it can put itself to STABLE equlibrium. So system under...