Chain of Similar Pendula (Soltion)

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In summary, Pavelbure9 has been experimenting with and studying these pendula for a long time and has a large working system in his museum. He has found that they can be activated by "hand" using a stable and strong power source, but that they can also be stimulated using ceteris paribus conditions using an electromechanical solenoid.
  • #1
pavelbure9
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I have a chain of similar pendula which is mounted equidistantly along a horizontal axis with adjacent pendula being connected with light strings. Each pendulum can rotate within
the axis but can not move sideways.

at the page http://btakashi.jp/archives/935 scroll to the bottom of the page and there is a pdf file to look at the image

Some big force is needed aside from the motor to have the pendula spin connected to each other, and I cannot use my hand because it is inaccurate.

So.. what kind of forces can be used as the "some big force"?
Also, how should I apply this "some big force" to the pendula? Again, I need a stable and strong power source.
 
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  • #2
pavelbure9, Welcome to Physics Forums!

I have been experimenting with and studying these pendula for a long time. We have a large working system in our museum.

Sorry, but I cannot get to that http site to see the image. The link does not open for me. Can you please check it to be sure it works for you? Thanks. Then, possibly others here can give you some tips/advice.

Cheers,
Bobbywhy
 
  • #3
pavelbure9, Thank you, the link above works now; I've seen the video!

That array of pendula looks much like the one in our Museum. We also activate ours by "hand". I don't know what you mean by that is "innacurate". It seems to demonstrate the sine-Gordon kink soliton very well. What is your objective?

Cheers,
Bobbywhy
 
  • #4
Oh our one only looks like the one in video. In fact, it's much smaller( 50 cm long,10 cm pendula). We are also conducting experiments testing sine-gordon equation. But we are testing the variables of it in ceteris paribusconditions to get exact data. To do this, we need exactly same amount of force each time doing experiments. Obviously,our body cann't do it. Do you have in mind any ways to apply force to pendula other than using human body?
 
  • #5
Ceteris paribus conditions to stimulate the pendula motion may be accomplished using an electromechanical solenoid. Position one where the shaft pushes against one pendulum. Energise the solenoid with the same voltage every time, the applied force would then be the same every time.

For a description, see:
http://en.wikipedia.org/wiki/Solenoid

You could buy one here for around TWO DOLLARS:
http://www.allelectronics.com/make-a-store/category/575/Solenoids/1.html

Cheers,
Bobbywhy
 
  • #6
Thanks a lot.
Me and my friend were trying pendulums with different sizes, from very small to big.
Thanks to you, I think we can get through this experiment.
Hope you enjoy your day.Pavelbure9
 
  • #7
When you do your experiment you might post the results and or video here on Physics
Forums. Members and Visitors will be interested in your results. This is a place to share science.

Cheers,
Bobbywhy
 

FAQ: Chain of Similar Pendula (Soltion)

1. What is a chain of similar pendula?

A chain of similar pendula is a system of multiple pendulums that are connected to each other in a series. Each pendulum has the same length and mass, and they are all connected by a thin string or rod.

2. How does a chain of similar pendula work?

The motion of a chain of similar pendula is governed by the laws of physics, specifically the law of conservation of energy and the law of inertia. When one pendulum is set in motion, it transfers its energy to the next pendulum, and this process continues throughout the chain.

3. What are the applications of a chain of similar pendula?

A chain of similar pendula is often used as a model system in physics to demonstrate wave propagation, resonance, and energy transfer. It can also be used in educational settings to teach concepts such as period and frequency of oscillation.

4. How does the length of the pendulum affect the motion of a chain of similar pendula?

The length of the pendulum affects the period of oscillation, which is the time it takes for one complete back-and-forth motion. In a chain of similar pendula, the length of each pendulum is the same, so the period of oscillation is constant throughout the chain.

5. What factors can affect the behavior of a chain of similar pendula?

Some factors that can affect the behavior of a chain of similar pendula include the length and mass of each pendulum, the strength and direction of external forces, and the angle at which the pendulum is released. Friction and air resistance can also alter the motion of the pendulums.

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