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New question #681383 on Yade:
https://answers.launchpad.net/yade/+question/681383

hello
i am read the source code of yade and noticed that the normal force between two polyhedra is calculated by:
normalForce=contactGeom->normal*prop*phys->kn
while kn is calculated by:
contactPhysics->kn = Kna*Knb/(Kna+Knb) 
the problem is that the unit of kn is Pa,when it multipy with volume, with unit of m³,  then the unit of normal force become N.m，but it suppose to be N. 
look forward for your answer

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