Recent content by zsero

I don't know if such a spring or multi-layer foam can be made or not. I just calculated the other way, constant jerk -> linear growing acceleration -> quadratic velocity -> cubic displacement I mean all I was interested is what is the minimal distance for a theoretically perfect constant jerk -...

Yes, I came to the same conclusion. A linear spring-mass system was not the best system as it has that harmonic movement with sin-cos functions for all derivatives. The theoretical best system is thus something like: - a progressive spring for the constant jerk part - after the jerk limit is...

I'm trying to calculate the theoretical minimum thickness of an "ideal foam" for a given jerk and acceleration limit. Say we have a ball in free fall from 1.83 meter, reaching 6 m/s. It then reaches an "ideal foam" for decelerating it. I'm trying to understand the connection between the...

Thanks for the help!

Thanks for the help! Actually, I'm not a Physics student, so I don't really know, but I'd guess it's the exponential delay. So if B doubles then the constant becomes half, thus the half-life becomes double. Is this correct?

OK, I arrive at the following equation: -B/A*ln(x) = c*t + k1 My problem here is that I don't understand the meaning of the equations and that what is asked by half-life and steady state. How can I get the half-time from this equation?

Homework Statement This question came up in a computer science / robotics exam and I still don't know the solution for it. I figured out that it's classical mechanics related, so I thought this might be the best place to ask it. Homework Equations C = A*x + B*dx/dtThe Attempt at a Solution I've...

Thanks for all the detailed explanations! What I am most interested in is that what would be the proper way to simulate the flying asteroids in a computer generated movie, as I would like to create one myself. The only example I found was here...

Thanks, the physics part is now clear! With Euler's rotation theorem, this is what makes me confused: "Euler's rotation theorem states that, in three-dimensional space, any displacement of a rigid body such that a point on the rigid body remains fixed, is equivalent to a single rotation about...

My apologies, when you just answered in one line, I thougth you answered ironically, because I got a contradicting answer here: http://physics.stackexchange.com/questions/10990/the-rotating-movement-of-an-asteroid/10992#10992 I am glad I found this forum, because since I have started reading...

Sorry, I'm not a physics student, and that's why I asked this explicitly: "is it possible for any solid object to rotate around more then one axis? Or every possible rotation for a solid object in 3D is actually around one axis?"

I almost all movies where you could see an animation about an asteroid, they move in a very distinct way. I don't know how to explain better, but I think what we can see in the movies is that the asteroid is rotating around not one, but around two or three axis at a given time. What is this...