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Re: [Phys-L] routine assumptions and plausible hypotheses ... or not

From: Bernard Cleyet <bernardcleyet@redshift.com>
Date: Sun, 8 Jul 2012 14:19:55 -0700

On 2012, Jul 08, , at 10:38, John Denker wrote:

*) pulleys are frictionless (unless otherwise specified)

Here's the OT writing.

Back in the fifties much time consumed on machines including efficiency. Even plotted in the case of a pulley system. The graf is an inverted U; Efficiency as a function of weight.

bc

References:
- Re: [Phys-L] Energy Concept Inventory
  - From: Antti Savinainen <antti.savinainen@luukku.com>
- Re: [Phys-L] Energy Concept Inventory
  - From: John Denker <jsd@av8n.com>
- Re: [Phys-L] Energy Concept Inventory
  - From: "Folkerts, Timothy J" <FolkertsT@bartonccc.edu>
- Re: [Phys-L] Energy Concept Inventory
  - From: brian whatcott <betwys1@sbcglobal.net>
- Re: [Phys-L] Energy Concept Inventory
  - From: Jeff Bigler <jcb@alum.mit.edu>
- [Phys-L] routine assumptions and plausible hypotheses ... or not
  - From: John Denker <jsd@av8n.com>

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