Subject:
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Re: Motor Sensor (fwd)
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 10 Jun 1999 13:51:23 GMT
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Original-From:
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Jacob Schultz <c948605@student.dtu.dk>
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Viewed:
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1048 times
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On Wed, 9 Jun 1999, Jim Choate wrote:
> There is no linear acceleration on a circle.
>
> Things go in circles because their velocity vector changes. *ANY* time a
> velocity vector changes *IT MUST* be as a result of a force. A force is
> *DEFINED* at f=ma.
What about spinning objects? A spinning object is NOT necesarely forced in
circular motion by external force. Try spinning the a wheel, then stop
forcing it - it will continue to spin. If you force an object in a point
which is not the center of gravity of the object, it will start a linear
motion, exactly as if your point of attack was the COG, but it will also
start a rotation. The vector of angular acceleration will be constant and
orthogonal to the wheel. This is just a mathematical definition, and it's
totaly clear, that internal forces in the wheel exists to make each
molecule accelerate towards the center of the wheel.
Jacob Schultz
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Message is in Reply To:
 | | Re: Motor Sensor (fwd)
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| ----- Forwarded message from Peter Hesketh ----- Date: Wed, 9 Jun 1999 20:13:24 +0100 From: Peter Hesketh <pbh@phesk.demon.co.uk> Subject: Re: Motor Sensor (fwd) Sorry, but it is _linear_ acceleration which makes things go in circles. They then go (...) (25 years ago, 9-Jun-99, to lugnet.robotics)
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