The wonder of centrifugal force...

[GravityMechanic]

Many users of this forum believe that centrifugal force will prove to be an important feature of a working gravity motor. For those of you who are not too conversant with centrifugal force the following two items may prove interesting.

US Patent Number - 1154094

On July 21st, 1915 an inventor named Harry L. Cassard from Philadelphia, Pennsylvania, USA filed for a patent on a climbing ball toy comprising a basic support with eccentric swivelling handle, a guide fixed to the basic support and a ball rising and falling on said guide from centrifugal action. This elegant invention makes a wonderful simple centrifugal force demonstrator. You can view this patent at Google Patent Search.

Professor Julius Sumner Miller (1909 – 1987)

Born in Billerica, Massachusetts, USA. He attained degrees in philosophy and physics from Boston University and the University of Idaho. He subsequently held fellowship positions at various universities, including one as a Carnegie Grant Fellow with Albert Einstein at the Institute for Advanced Studies, Princeton. Professor Miller taught physics at many colleges from 1936 to 1974. He wrote ten books and produced several hundred science TV programs. Walt Disney named him "Professor Wonderful" for his work on the Mickey Mouse Club.

One of his television programs covered the physics of Centrifugal Force. The following two videos are very educational and can be found on YouTube.

Centrifugal Force – Part 1.

Centrifugal Force - Part 2.

In the second video you will learn how a 10 gram weight can be made to lift a 100 gram weight vertically using the classic ‘string in the glass tube’ demonstration!

I hope you have found this post informative. If you have any relevant information to share on this topic then please take a moment to send your comments via a post reply, private message or e-mail. You are also welcome to telephone me on +44 114 360 8831 or via Skype for a talk about this post, any other forum topics or initiatives for promoting collaboration to help turn ideas into reality. Telephone anytime, I am usually in, if I am out on an errand just leave a message on my voicemail and I will get back to you as soon as I return. I look forward to hearing from you.

~Brian~

[RIPPERTON]

Thanks Brian, those videos were very interesting. The small weight lifting the heavy weight was very inspiring but..
I got more of a buz from the emptying of the jug of water using a swirl to centrifuge the water out to the sides and create an air funnel up the middle.
I used to like watching him when I was a kid.

[jim_mich]

Many times we will be told that centrifugal force is a fictitious force. Pay close attention to what Professor Julius Sumner Miller says between 2:45 and 3.32 in his YouTube "Physics - Centrifugal Force pt. 2" demonstration:

Now we must never say that there is a force radially outward on this thing pulling on the string.

Oh, wait a minute! I said something wrong. And I’m glad I did because it may lead some of you to catch me up on it. I said, “There is a force radially outward on this thing pulling on the string.� Yes, yes, yes. There is a force which the string exerts on the body. And there is a force which the body exerts on the string. But there is no force radially outward on the body.

So you see ladies and gentlemen, boys and girls, in the heat of the argument I could very well make an utterance, which the good people will quickly detect. And I’m glad I detected it so you will see there are occasions when I say things that are not right.
-- Professor Julius Sumner Miller

There is no force radially outward on the body. There is inertial momentum force of the body forced to constantly change direction, thus moving in a circle that produces a force. Depending on directional point of view this force is labeled centrifugal force or centripetal force. In reality these are merely different aspects of the same stress.

When a body moves in a circle with uniform velocity, a force must act on the body to keep it in the circle without change of velocity. The direction of this force is towards the center of the circle. If this force is applied by means of a string to the body, the string will be in a state of tension. To a person holding the other end of the string, this tension will appear to be directed toward the body as if the body had a tendency to move away from the center of the circle which it is describing. Hence this latter force is often called centrifugal force. The force which really acts on the body being directed towards the center of the circle is called centripetal force, and in some popular treatises the centripetal and centrifugal forces are described as opposing and balancing each other. But they are merely the different aspects of the same stress.
-- Clerk Maxwell.