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Re: [Phys-L] treating force as a vector ... consistently



Regarding JD's illustrative code:

...
name force (coordinates in some basis)
------ ---------------------------------
Buffy ( 1, 1, 1)
Kendra ( 1, 1, -2)
Faith (-1, -1, 0)
...
...
Buffy.force = vec3(1, 1, 1); // initialize a vector in terms of components
Kendra.force = vec3(1, 1, -2);
Faith.force = crossproduct(Buffy.force, Kendra.force) / 3;
...

It appears the assignment for Faith.force above results in the components of the force on Faith being (-1, +1, 0) rather than being (-1, -1, 0) as claimed earlier.

Also it seems either JD is using a weird set of units that makes forces dimensionless quantities, or the number 3 in the denominator of the Faith.force assignment carries hidden force dimensional units, or else the Faith.force assignment above is dimensionally inconsistent.

Also, how about making the particle names Faith, Hope & Charity?

David Bowman