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Subject:	Re: Tensile strrength
From:	Louis Hart <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Louis Hart <[log in to unmask]>
Date:	Wed, 16 Dec 2009 14:41:40 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (44 lines)

Ahne, Technetters, keep in mind Newton's second law. If something is being accelerated, it is experiencing a force. If it is not being accelerated, there is no net force.

A force is required to keep an object moving in a circle, or ellipse (as the Earth in its orbit), since the object's velocity is changing and it is accelerating, constantly. After the part is ripped off, the only force it experiences is that of gravity so it will be accelerated toward the center of mass of the Earth.

A while back I read something by some philosopher, something like 'Newton's theory of motion is the greatest intellectual achievement in human history'.

Einstein's General Theory of Relativity connecting gravitational mass with the mass in Newton's second law must be way up on the list of intellectual achievements, but I haven't gotten a good grasp of it. Any Technetters who can help me understand it, please let me know offline.

Louis Hart

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahne Oosterhof
Sent: Wednesday, December 16, 2009 12:37 PM
To: [log in to unmask]
Subject: Re: [TN] Tensile strrength

And I expected to see "force", not "acceleration".
(The acceleration comes after the force has ripped the part off the board.)


Having fun,
Ahne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Thayer, Wayne - IIW
Sent: Tuesday, 15 December, 2009 17:10
To: [log in to unmask]
Subject: Re: [TN] Tensile strrength

Just to add a number to this, I get over 9000G's of acceleration on the
parts near the ends of this board!

Wayne Thayer

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