Double Pendulum

[Anand361683]

Thumbs Up If U Looking For Pendulum Music And Came Here...

[datzfast]

dang i was thinking this was a sex act

[halo2party]

Double pendulum, all the way!

What does it mean?

[Deathcanliveinlife]

i dont quite understand how double pendulums can be random because wouldnt they have to obey the laws of mechanics thereby meaning you could (eventually) do the test with the same outcome?

[kebabflaps]

@Deathcanliveinlife

Chaotic systems exhibit a property called sensitivity to initial conditions. That means that no matter how exactly you tried to duplicate the initial angles and velocities for each experimental run, the motion would soon be very different from experiment to experiment.

[Deathcanliveinlife]

@kebabflaps Ah ok i think i understand now, thanks!

[DeathZeroTolerance]

This isn't a completely stochastic process is it? assuming you could set high precision initial conditions (like in software simulation), it should be deterministic, no?

[UTFreak87]

looks awesome!

[cheong1316]

double pendulum is difficult to calculate

(period / angular frequency)

[christinawilliams88]

hello everyone! i have picked the double pendulum as a project to model. anyone have any ideas or insights?!

[AndyGoRAWR]

You should have video taped it until it stopped because at that rate it looked like it was going strong, how long did it go for? That is neat how when it swings the second piece, it generated more energy to keep it going lol.

[518schenectady]

would it be possible to get more energy out of the thing than it takes to lift it up to start it

[josephdw]

You cannot defeat the Laws of Motion:

Energy cannot be created or destroyed.

There is an interesting commercial machine that uses a 'water hammer' effect for heating, that does appear to produce more heat for the energy it uses than it should.

[feralucce]

@518schenectady No. shame on you for trolling like that

[518schenectady]

does that thing ever stop or how long will it go for

[josephdw]

The more energy you put in - lifting the arm higher to begin - the faster it starts, and longer it runs. The long arm on a good example will swing 25 times or so, the small arm much more. If you try to 'throw it' into action for even more energy, it tends to rattle side to side, rather than oscillate.

[Convert17]

YAY! First comment! Cool vid. Did you build that yourself? You are very correct in the Chaos Theory. Although there are some similarities when the pendulum is in the early stages, very minute difference can throw the pendulum into "chaos".

[josephdw]

Thanks - I built it because I saw a TV program on chaos theory, and couldn't find one to buy.