ok so then what energy isn't mechanical?
hey if your noit being sarcastic i'm glad through my learning you learnt something... but is it really true?
Whats ur point?Potential energy always has a source force field (nuclear/gravitational/electromagnetic). When we say that work is done, we should remember that it is only a mathematical quantity which is so defined that it can be equated with the change in Kinetic Energy.
The expressions ∫F.ds can be obtained from 1/2mv2 in conservative force field.
When mechanical energy changes into thermal energy, we have to introduce J as multiplicative factor to obtain the heat generated. But in that case too we say that kinetic energy transforms into thermal energy. Actually they are shown to be equal by some transformation rule.
If you hit a thing by a hammer, the Kinetic energy of hammer sets the air in motion and we hear a sound. The energy is still mechanical.
No. But when any type of energy ...be it chemical, nuclear, or (heaven forbid) mechanical energy (definition 2)...is transfered into or out of the system, it changes the mechanical energy (definition 1) of the system. This follows from conservation of energy law, dE + dU + dK = 0, where dE represents the energy transfered into or out of the system from work done by non-conservative forces.PhanthomJay are all energies mechanical?
When we talk about 'mechanical energy' we usually mean energy due to an object's motion (kinetic energy) and position (potential energy). The kinetic energy meant here is macroscopic kinetic energy--due to the object's motion as a whole, not its internal molecular motion. Similarly, the potential energy included in 'mechanical energy' is due to the object's macroscopic position--it excludes all sorts of internal energy such as chemical energy.Ok, so in all the previous phenomenon discussed (chemical energy, electrical energy, etc) there are forces involved and movement, so I am prone to believe, based strictly on these definitions, that they (chemical or electrical phenomenon) are also mechanical systems
Usually, yes. But it depends on the context.So mechanical energy is used to describe only what its name implies, mascroscopic objects?
When the electron is the object, then you can consider its electrostatic potential energy (when with another charged particle) as part of the mechanical energy of the system.No electrons for electrical energy (because the electrons do have mass)?
In any macroscopic non-electrical machine the electrons are too small to matter, so any energy they have isn't included. In electrical machines, which specifically deal with moving electrons, this is obviously different. For mechanical energy, think in terms of classical machines and what we build from them. Something like a clock that uses a pendulum and weights is pure mechanical energy, no electrical or chemical.So mechanical energy is used to describe only what its name implies, mascroscopic objects? No electrons for electrical energy (because the electrons do have mass)?