Force and Energy?

A forum set up for physics questions from students in the courses PHYS1121, 1131, 1221 and 1331 at the University of New South Wales. It is intended for questions that cannot readily be answered in class,
either because they fall outside the main syllabus and therefore would be distraction (however interesting) or for other reasons.

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Boris Lagutin
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Force and Energy?

Postby Boris Lagutin » Wed Mar 02, 2016 1:13 am

There is a mass. If the mass's acceleration is caused by some force it is clear. But what if the mass's acceleration is caused by NOT A FORCE as it happens in "Ehrenberg-Siday-Aharonov-Bohm effect" (if I understand this effect right)? May it violate the conception of Energy? Here is a link to the article about this effect:

https://en.wikipedia.org/wiki/Aharonov% ... ohm_effect

Thanks a lot.
Last edited by Boris Lagutin on Wed Jun 21, 2017 8:17 am, edited 3 times in total.
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joe
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Re: Force and Energy?

Postby joe » Thu Mar 03, 2016 2:50 pm

Position, velocity and acceleration of particles are all classical concepts that do not simply correspond to the properties of very small things. An electron does not travel around a nucleus (if it did, it would be accelerating* towards the nucleus (centripetal acceleration) and therefore would radiate EM waves). A photon does not 'travel through' two slits+. And, on the quantum mechanical scale and over short timescales, energy is not precisely conserved, which is demonstrated by quantum tunneling.

I realise that this is only a general rather than a specific answer, but I'm afraid I know only a little about this effect.

* http://www.animations.physics.unsw.edu. ... otion.html
+ As in http://www.animations.physics.unsw.edu. ... index.html


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