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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: I gave the guesstimate.. posted by jneutron on January 14, 2004 at 05:48:52:
so here's a shorter version.Looked at the "guestimate" methodolgy. Thanks!
So, you derived the initial velocity of the dowel from its motion. This can be reasonably accurate.
In order to get the force, you need to know how long the finger was in contact with the dowel, accelerating it, right? Or you could use the distance over which it was in contact, and v2Sounds tricky to get accurate....
Perhaps you could think in terms of transfer of momentum, since you know M and V for the dowel, and then think of the cable impact as a transfer of the same momentum into the dielectric as a spring (giving you a deflection)? I don't know...
From Bruce's reply about the methodology, it looks like there is some deflection/movement of the entire cable (since it is hand-held), so not all of the force is applied to the compression of the dielectric.Perhaps it would make more sense to repeat the test with the cable resting against something that have sufficient mass to be considered a mechanical ground? This would eliminate one source of error, but probably hurt his finger more........
Peter
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Follow Ups
- Somehow obliterated the long post I typed yesterday.... - Commuteman 12:45:48 01/15/04 (2)
- whoops, blew the equation. - Commuteman 12:47:47 01/15/04 (1)
- Re: whoops, blew the equation. - jneutron 13:10:23 01/15/04 (0)
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