Conservation of Energy: Formula & Definition

AI Thread Summary
The discussion centers on the formula for the conservation of energy, emphasizing that energy cannot be created or destroyed. The key formula mentioned is dE/dt = 0, indicating that the change in energy over time is zero, which implies that the total energy remains constant. This leads to the conclusion that the energy before an event must equal the energy after, represented as Ein = Eout. Participants note the importance of considering various forms of energy, such as potential, kinetic, friction, and heat loss, when applying these principles. The conversation highlights the foundational concept that energy conservation is a fundamental principle in physics.
marshall4
Messages
50
Reaction score
0
What is the formula for conservation of energy?
 
Physics news on Phys.org
dE/dT = constant.

Or, if you prefer, the simpler

E = constant.

- Warren
 
Or: Ein = Eout
 
Oops, I meant dE/dt = 0, not constant. Of course, zero is a constant...

- Warren
 
If energy can neither be created nor destroyed - than the logical formula would be that energy before would have to equal energy after.

But you must consider potential, kinetic, friction, heat loss ect...j


Nautica
 

Thread 'Inclined treadmills and Galilean Invariance'

This has been discussed many times on PF, and will likely come up again, so the video might come handy. Previous threads: https://www.physicsforums.com/threads/is-a-treadmill-incline-just-a-marketing-gimmick.937725/ https://www.physicsforums.com/threads/work-done-running-on-an-inclined-treadmill.927825/ https://www.physicsforums.com/threads/how-do-we-calculate-the-energy-we-used-to-do-something.1052162/
View full post »
Thread 'Is 'Velocity of Transport' a Recognized Term in English Mechanics Literature?'

Thread 'Is 'Velocity of Transport' a Recognized Term in English Mechanics Literature?'

Here are two fragments from Banach's monograph in Mechanics I have never seen the term <<velocity of transport>> in English texts. Actually I have never seen this term being named somehow in English. This term has a name in Russian books. I looked through the original Banach's text in Polish and there is a Polish name for this term. It is a little bit surprising that the Polish name differs from the Russian one and also differs from this English translation. My question is: Is there...
View full post »

Thread 'Is calling fictitious forces "not real" just about terminology?'

Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...
View full post »

Similar threads

I Conservation of Momentum versus Conservation of Velocity
Replies
6
Views
2K
B Conservation of momentum and conservation of energy details
Replies
30
Views
3K
Law of Conservation of energy and Wnc
Replies
8
Views
2K
B Energy needed to raise an object to a certain altitude
Replies
7
Views
1K
Is Mechanical Energy Conservation Free of Ambiguity?
2
Replies
89
Views
10K
Conservation of energy in Gravitation
Replies
4
Views
1K
I Car, gas and total energy calculation
Replies
3
Views
1K
B Conservation of Energy: Ball on a U-Shaped Ramp
Replies
2
Views
399
B Study of SHM of an object attached to a vertical spring
Replies
7
Views
728
Regarding the idea of potential energy
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top