Re: Work; the correct one

[David Rutherford <drutherford@SOFTCOM.NET>]

David Rutherford wrote:
> I think the equation for work in (3) below is more fundamental, but you
> could probably also write a general equation for work W as
>
> W = \int_s1^s2{F(x,y,z,t).ds}
>
> where F(x,y,z,t) is the force, ds is the differential displacement in
> spacetime, and s1 and s2 are initial and final events. This would
> include, not only spatial displacements, but also time displacements for
> work done on 'stationary' particles.

Sorry, I should have said that F(x,y,z,t).ds is the four-dimensional dot
product of the four-force F and the four-displacement ds.

--
Dave Rutherford
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