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References: [ pseudowork: 235 ] [ ke: 1313 ]

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1. pseudowork (score: 198): Author: Chuck Britton <britton@NCSSM.EDU>; Date: Fri, 21 Dec 2001 10:58:01 -0500; At 9:07 AM -0600 12/21/01, Tom Wayburn wrote concerning Re: pseudowork: Please define pseudowork, someone. (Carl?) I have never heard the term used. Work/Energy Theorem delta KE = Work (net) Let an a; /archives/2001/12_2001/msg00362.html (5,094 bytes)
2. pseudowork (score: 183): Author: Tom Wayburn <twayburn@WT.NET>; Date: Fri, 21 Dec 2001 09:07:29 -0600; One last word: The electric current entering your building because the TV is on is my perfect example of work if the bldg is the Control Volume. Friction is an example of lost work and must result in; /archives/2001/12_2001/msg00361.html (6,603 bytes)
3. beyond the valley of the pseudowork (episode VI) (score: 172): Author: Bob Sciamanda <trebor@VELOCITY.NET>; Date: Fri, 8 Feb 2002 12:04:16 -0500; JD writes: "You can't separate kinetic energy into a center-of-mass piece distinct from the other pieces; it's too nonlinear for that." You can *always* write the KE of a system as the "CM KE" plus t; /archives/2002/02_2002/msg00418.html (4,760 bytes)
4. PseudoWork ???? (score: 169): Author: Richard Tarara <rtarara@SAINTMARYS.EDU>; Date: Fri, 29 Oct 1999 14:27:41 -0500; Too stupid to stay out of these, But is there really any problem here? The energy transformations are internal to me, but these enable me to exert a force on the wall. That force is countered by a fo; /archives/1999/10_1999/msg01083.html (6,509 bytes)
5. pseudowork (score: 166): Author: "Carl E. Mungan" <mungan@USNA.EDU>; Date: Fri, 30 Nov 2001 14:22:29 -0500; A motionless box of mass m is dropped from an infinitesimal (ignorable) height onto a rapidly moving conveyor belt. Let the 'system' be the box.... describe the gain in KE that the box undergoes. Thi; /archives/2001/11_2001/msg00514.html (5,738 bytes)
6. Kinetic Energy elephant re-examined by formerly-blind person (score: 162): Author: "John S. Denker" <jsd@MONMOUTH.COM>; Date: Sat, 25 Jan 2003 07:54:19 -0500; Bingo. A light just came on for me. Seeds planted by John M. and Bob S. have sprouted. When it comes to KE (Kinetic Energy) I thought I knew "the" definition but alas I was just looking at part of t; /archives/2003/01_2003/msg00240.html (9,044 bytes)
7. beyond the valley of the pseudowork (episode VI) (score: 155): Author: "John S. Denker" <jsd@MONMOUTH.COM>; Date: Fri, 8 Feb 2002 12:15:14 -0500; Bob Sciamanda wrote: You can *always* write the KE of a system as the "CM KE" plus the KE relative to the CM frame: OK. Fixed. Thanks. I note that you can't do this for any other frame; the CM frame; /archives/2002/02_2002/msg00426.html (3,705 bytes)
8. why pseudowork (NOT) (score: 152): Author: Richard Tarara <rtarara@SAINTMARYS.EDU>; Date: Fri, 29 Oct 1999 10:03:28 -0500; I have a problem with mechanism. Assuming momentum conservation then the 1 kg block moves backwards with speed v. This also conserves the CM motion so we can deduce no external forces. However, the b; /archives/1999/10_1999/msg01060.html (5,857 bytes)
9. why pseudowork (NOT) (score: 152): Author: Bob Sciamanda <trebor@VELOCITY.NET>; Date: Fri, 29 Oct 1999 12:18:01 -0400; I agree with all said by John. Nothing strange in this inelastic collision. Note that applying the (pseudo) W-E Th to the two-mass system gives 0 = 0 cuz this theorem knows nothing about changes in i; /archives/1999/10_1999/msg01066.html (7,204 bytes)
10. pseudowork (score: 143): Author: Chuck Britton <britton@NCSSM.EDU>; Date: Wed, 28 Nov 2001 08:17:26 -0500; A motionless box of mass m is dropped from an infinitesimal (ignorable) height onto a rapidly moving conveyor belt. Let the 'system' be the box. Let's use some of these 'confusing' terms to describe; /archives/2001/11_2001/msg00438.html (4,760 bytes)
11. why pseudowork (NOT) (score: 143): Author: John Mallinckrodt <ajmallinckro@CSUPOMONA.EDU>; Date: Fri, 29 Oct 1999 08:55:21 -0800; On Fri, 29 Oct 1999, Richard Tarara wrote: I have a problem with mechanism. Assuming momentum conservation then the 1 kg block moves backwards with speed v. There you go. This also conserves the CM m; /archives/1999/10_1999/msg01063.html (5,494 bytes)
12. why pseudowork (NOT) (score: 143): Author: Joseph Bellina <jbellina@SAINTMARYS.EDU>; Date: Sun, 31 Oct 1999 19:14:41 -0500; One of the powers of thermodynamics is that one can invoke principles without needing to know the mechnanism. The thermodynamic result only restricts the set of possible mechanisms. That seems to be; /archives/1999/10_1999/msg01155.html (4,414 bytes)
13. Violation of Newton's third law in motile active agents? (score: 106): Author: John Denker <jsd@av8n.com>; Date: Tue, 31 Oct 2023 01:45:51 -0700; Newton's third law, expressed in terms of momentum flow, is pretty fundamental in physics. Yes. came across an article which claims that Newton's third law doesn't apply to "active motile agents." I; /archives/2023/10_2023/msg00027.html (5,937 bytes)
14. rolling (score: 102): Author: "Carl E. Mungan" <mungan@USNA.EDU>; Date: Thu, 5 Feb 2004 11:30:42 -0500; OOPS! I'm highly embarrassed by having pushed the send button a bit too fast. I wrote: The *real* work you have to do *is* double because the hollow cylinder ends up with equal amounts of translation; /archives/2004/02_2004/msg00051.html (5,677 bytes)
15. Car acceleration (score: 76): Author: "John S. Denker" <jsd@MONMOUTH.COM>; Date: Mon, 4 Feb 2002 14:35:58 -0500; "Carl E. Mungan" wrote: He clearly had a circle around the car indicating the choice of system and an arrow on his diagram labeled "work of the road on the car." I put up my hand at the end and asked; /archives/2002/02_2002/msg00131.html (7,637 bytes)
16. ENERGY WITH Q (score: 75): Author: Ludwik Kowalski <kowalskiL@MAIL.MONTCLAIR.EDU>; Date: Tue, 27 Nov 2001 22:40:05 -0500; Jim Green wrote: "We _define_ Int F*ds as work." Carl E. Mungan replied: "No, you just defined pseudowork." Recognizing that work and pseudowork are two different concepts is useful. But why not to s; /archives/2001/11_2001/msg00431.html (7,378 bytes)
17. rolling (score: 74): Author: "Carl E. Mungan" <mungan@USNA.EDU>; Date: Thu, 5 Feb 2004 12:06:30 -0500; I should stop, but how can I resist one more addendum? --Carl SPECIAL CASE 2: heavy axle connected to two light wheels (g=0) T = f rotational KE = 0 translational KE = half of pseudowork you do = hal; /archives/2004/02_2004/msg00053.html (4,314 bytes)
18. ENERGY WITH Q (score: 73): Author: "Carl E. Mungan" <mungan@USNA.EDU>; Date: Tue, 27 Nov 2001 18:14:50 -0500; Example: a block slides across a rough stationary table. How much of the mechanical energy of the block was lost via work and how much via heat? I think it is possible to answer this question. But it; /archives/2001/11_2001/msg00422.html (8,323 bytes)
19. Car acceleration (score: 70): Author: "John S. Denker" <jsd@MONMOUTH.COM>; Date: Tue, 5 Feb 2002 17:10:02 -0500; Bob Carlson wrote: Try looking at this document: http://www.mctc.mnscu.edu/~carlsoro/d2230.htm Carl E. Mungan commented thereon: "The kinetic energy of the box is changing, so some force must be doin; /archives/2002/02_2002/msg00190.html (9,581 bytes)
20. Car acceleration (score: 68): Author: "Carl E. Mungan" <mungan@USNA.EDU>; Date: Mon, 4 Feb 2002 17:29:38 -0500; John D, thanks for your reply, always appreciated: The key concept hear is _momentum_. Momentum is transferred across the aforementioned system boundary. Students can easily enough calculate the effe; /archives/2002/02_2002/msg00141.html (6,658 bytes)

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