Energy is

  • Thread starter Avgiu
  • Start date
  • #1
Avgiu
7
0
I have heard one definition of energy meaning a degree of inertial resistance... can anyone give me a different working condition for the word
 

Answers and Replies

  • #2
moose
547
0
Degree of inertial resistance sounds more like mass to me... *shrug*
 
  • #3
z-component
489
2
In physics, energy is the capability of something to do work. And yes, a "degree of inertial resistance" is mass.
 
  • #4
Ki Man
539
0
yea degree of inertial resistance does sound like mass. but mass is energy according to E=MC^2 so i guess its right in a way. my pinky is energy along with my textbook and keyboard
 
  • #5
blt93932
6
0
Matter is not energy, matter can become energy and vice vesa.
 
  • #6
Danger
Gold Member
9,756
253
I'm not quite in agreement with that, but it might be just a matter of me using the wrong terminology. Given the wave functions involved, I always consider matter to be energy in a bound state, roughly analogous to ice being water in a bound state.
 
  • #7
PatPwnt
83
0
Matter IS... another form of energy or vice versa
 
  • #8
HallsofIvy
Science Advisor
Homework Helper
43,021
971
"Energy" is a bookkeeping device (how many words do you know with three double letters in a row?). People noticed long ago that kinetic energy is conserved in simple collisions so developed "conservation of energy". Of course, if the collision is not "elastic" that doesn't work so they added "heat" as a type of energy to "explain" that (and keep "conservation of energy" true). When relativity made it clear that mass could be converted to energy (and vice-versa) mass itself was declared a kind of energy just to make "conservation of energy" still work!
 
  • #9
pmb_phy
2,952
1
Avgiu said:
I have heard one definition of energy meaning a degree of inertial resistance... can anyone give me a different working condition for the word
The term Inertial resistance has never been defined in physics. Let me offer this;

inertia is defined as the amount by which a body resists changes in momentum. So what would you call something which resist a change in momentum? I'd call that "force" in that F = dp/dt.

The definition of energy is given here

http://www.geocities.com/physics_world/mech/what_is_energy.htm

Pete
 

Suggested for: Energy is

  • Last Post
2
Replies
36
Views
4K
  • Last Post
Replies
13
Views
2K
Replies
2
Views
956
  • Last Post
2
Replies
45
Views
50K
  • Last Post
Replies
1
Views
598
  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
4
Views
809
  • Last Post
Replies
6
Views
698
Replies
6
Views
423
Replies
3
Views
603
Top