Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum what is the relation between force and energy?

 Physics Forum Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

# what is the relation between force and energy?

## what is the relation between force and energy? - Physics Forum

### what is the relation between force and energy? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

#1
09-20-2004, 09:11 AM
 yogesh Guest Posts: n/a
what is the relation between force and energy?

Both stress and pressure can be defined as energy/volume.
i.e they have the potential to do some amount of work per unit volume.

Now based on the similar lines, can *force* be called as
*energy/length*.?

If I know the *force* how can I conclude about the *work* it will
going to produce or *energy* i.e its potential.
In other words, what is the relation between *force* and *energy*?

If I only know the forces acting on the systems,can I come to know
about the energy content in that system.?

Thank you..
regds,
Yogesh Joshi
#2
09-20-2004, 10:45 AM
 Bjoern Feuerbacher Guest Posts: n/a
what is the relation between force and energy?

yogesh wrote:

That would be a strange way to define them. The standard definition
is still force/area.

work/length would be more appropriate.

Look up the definition of work.

The simple-minded one:
work = force times distance during which the force is acting

Not-so-simple minded:
work = force times distance during which the force is acting,
in the direction of the force

Real one:
work = integral of the force along the path on which it is acting

You can't.

Bye,
Bjoern
#3
09-20-2004, 01:39 PM
 N:dlzc D:aol T:com \(dlzc\) Guest Posts: n/a
what is the relation between force and energy?

Dear yogesh:

"yogesh" <[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ] m...
....

No, because you don't know the *history* of those forces, and you don't
know what initial energy the systems had wrt you.

David A. Smith

#4
09-20-2004, 02:17 PM
 puppet_sock@hotmail.com Guest Posts: n/a
what is the relation between force and energy?

[Only registered users see links. ] (yogesh) wrote in message news:<f88a27e4.0409200111.bd7020a@posting.google.c om>...

Note, though, that just becaust they have those units does not make
stess and pressure the same thing. In general, stress is a tensor,
and the usual formulation of pressure is as a scalar.

You need to get yourself a good senior highschool or first year
university textbook and study up.

And force is a vector. So you might, in some situations, think
of its units that way. But it's misleading to think of force
*as* work/length. That is only the units.

Work is force dotted into the displacement it acts through.

W = F.d

where F and d are both vector quantities.

Maybe, but not in general.

In some cases, the forces may be enough to work out the motions
involved. But in the general case you will need more. And to
calculate the work done you need the displacement that each force
is applied through. And it is not the case that you can work
this out with only the forces in at least some cases. You would
need some other boundary conditions in general, such as starting
velocities, masses, and maybe other stuff as well.
Socks
#5
09-20-2004, 04:35 PM
 yogesh Guest Posts: n/a
what is the relation between force and energy?

> > If I only know the forces acting on the systems,can I come to know
But if I know the pressure ( or if I can calculate the pressure from
the forces) then certainly I know the energy/volume of the system.

#6
09-20-2004, 04:56 PM
 rsm109@york.ac.uk Guest Posts: n/a
what is the relation between force and energy?

[Only registered users see links. ] (yogesh) wrote in message news:<f88a27e4.0409200111.bd7020a@posting.google.c om>...

The work done is the integral of the force along the path taken. The
change in potential energy is the negative of this. Conversely, the
force acting on a particle at a point is the negative of the gradient
of the potential at that point.
#7
09-20-2004, 04:56 PM
 Bjoern Feuerbacher Guest Posts: n/a
what is the relation between force and energy?

yogesh wrote:

No. Why do you think so? Pressure has the same units as energy/volume.
But pressure is not the same as energy density!

Bye,
Bjoern
#8
09-20-2004, 05:08 PM
 robert j. kolker Guest Posts: n/a
what is the relation between force and energy?

yogesh wrote:

Since the work took an interval of time to do, the best you can say is
average energy/unit of time.

Bob Kolker

#9
09-20-2004, 05:14 PM
 TomGee Guest Posts: n/a
what is the relation between force and energy?

[Only registered users see links. ] (yogesh) wrote in message news:<f88a27e4.0409200111.bd7020a@posting.google.c om>...
Einstein's E=mc^2 formula stipulates what energy is equal to, but it
does not say what energy is. Energy is defined in one way as "a
vigorous exertion of power," and power is defined as having the
"...ability to act or produce...(or undergo)...an effect." Force, a
synonym for power, "...implies the actual effective exercise of
power." Energy, as heat, produces light, which is, in effect, "a
vigorous exertion of power." Such exercise of power is a force;
therefore, energy is a force.
TomGee
#10
09-21-2004, 02:51 AM
 Old Man Guest Posts: n/a
what is the relation between force and energy?

"Bjoern Feuerbacher" <[Only registered users see links. ]-heidelberg.de> wrote in message
news:cin23v\$946\$[Only registered users see links. ].uni-heidelberg.de...

Old Man has the thought that, in GTR, the energy
density from pressure gravitates.

The "water potential" (J / m^3) inside a cellular membrane
can be measured as a pressure difference (Pascals). One
can also measure the vapor pressure of the cellular fluid.
This is equivalent to measuring thedecreasrd (negative)
cellular water potential due to the presence of solutes, called,
"osmotic potential". In plant cells, the water potential is
the algebraic sum of positive cell pressure (turgor) and the
negative osmotic potential of the cell water.

[Old Man]

 Tags energy , force , relation

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home General Science Forums     Biology Forum     New Member Introductions Forum     Chemistry Forum         Organic Chemistry Forum     Physics Forum     General Science Questions and Layperson Board         Science and Religion Forum         Zoology Forum     Environmental Sciences and Issues General Forum     Chit Chat         Science and Lab Jokes     Article Discussion     Molecular Biology News and Announcements         Conferences , Symposiums and Meetings         Molecular Station Suggestion Forum         Instructions for Posting, Help, and Frequently Asked Questions     Science News and Views         Molecular Biology Lectures and Videos     Science Careers         Post-doctoral         Medical School         Ph.D Doctor of Philosophy         Science Jobs Forum Molecular Research Topics Forum     PCR - Polymerase Chain Reaction Forum         Real-Time PCR and Quantitative PCR Forum     Bioinformatics         BioStatistics Forum     Molecular Biology Techniques         Molecular Cloning Forum         Electrophoretic Mobility Shift Assay Forum         Agarose Gel Electrophoresis Forum         BioPhysics Forum         Gene Therapy     Cell Biology and Cell Culture         Apoptosis, Autophagy, and Necrosis Forum         Flow Cytometry Forum         Transfection Forum         Confocal - Microscopy Imaging Techniques         Immunology and Host-Pathogen Interactions         Signalling Biology         Stem Cell Forum     Basic Lab Protocols and Techniques         SDS-PAGE Gel Electrophoresis Forum     DNA Techniques         DNA Extraction Forum         cDNA Forum     Epigenetics Forum: DNA Methylation, Histone and Chromatin Study         ChIP Chromatin Immunoprecipitation Forum     Protein Science         Antibody Forum             Immunoprecipitation Forum         Western Blot Forum         Protein Crystallography Forum         Recombinant Protein Forum         ELISA Assay Forum         Protein Forum     Proteomics Forum         Peptide Forum         Mass Spectrometry Forum         2-D Gel Electrophoresis Forum     Omics and Genomics Forum         Microarrays Forum         Genomics Forum     RNA Techniques Forum         RNAi and SiRNA Forum     Histology Forum         Immunohistochemistry Forum         Immunocytochemistry Forum         Electron Microscopy Forum         Immunofluorescence Forum     Protocols and Methods Forum     Molecular Biology Articles and Protocols     Animal and Molecular Model Systems         Drosophila Forum         Yeast Forum         Zebrafish Forum         Botany Forum         C Elegans Forum         Arabidopsis and Plant Biology         Microbiology Forum         Knockout Mouse Forum     Chromatography Forum Products and Vendor Discussion     Molecular Biology Products and Vendors         Bad Product/Service? Post Here         Lab Equipment Discussion and Reviews Regional Molecular Biology Discussion     Forum Chemie     Forum Biologie     Forum Biologia     Forum Chimica     Forum Physik     Forum De Chimie     Forum De Physique     Forum Chemia     中国人分子的生物学论坛 Chinese     Greek Molecular Biology Forums     分子生物学のフォーラム Japanese     ميدان فارسى. Persian Molecular Biology     [أربيك] علم ساحة- Arabic     Forum de Biologie Moleculaire     Forum Biologia Molecolare     Forum die Molekularbiologie     Foro Biologia Molecular

 Similar Threads Thread Thread Starter Forum Replies Last Post Jan Gooral Physics Forum 0 05-22-2008 02:52 PM sdr@sdrodrian.com Physics Forum 1 01-27-2008 01:53 PM James Redford Physics Forum 0 07-31-2005 12:08 PM Don1 Physics Forum 13 07-21-2005 12:15 PM Donald G. Shead Physics Forum 5 08-14-2003 11:43 PM

All times are GMT. The time now is 08:14 PM.

 Contact Us - Molecular Biology - Archive - Privacy Statement - Top