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Best answer by Werner_E

1) You had a multiplication sign between Find and the vector of variables Ri

2) Using a solve block with numeric evaluation will require you to provide guess values for the solved for variables. (For reasons I can't explain symbolic evaluation of Find will return wrong results, even if the units are omitted)

2 replies

W
Werner_E25-Diamond IAnswer
25-Diamond I
April 19, 2013

1) You had a multiplication sign between Find and the vector of variables Ri

2) Using a solve block with numeric evaluation will require you to provide guess values for the solved for variables. (For reasons I can't explain symbolic evaluation of Find will return wrong results, even if the units are omitted)

W
Werner_E25-Diamond I
25-Diamond I
April 19, 2013

Correction: Symbolic evaluation without units will give you a solution (I got confused with N and lbf), but a different one, as your system has no unique solution.

Symbolic eval with units returns a solution vector with zeros, which is wrong - don't know why

L
lvl10720-Turquoise
20-Turquoise
April 21, 2013

It seem to be like so:

Gauss-Jordan+Elimination+Method+.PNG

Best Regards.

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
April 21, 2013

Dennis Lopez wrote:

Hello,

I'm trying to solve for 3 values, having 3 equations,

Show please the picture of your forces.

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