If the coordinate axes are principal axes, so that the stress matrix has the form

[ 1 0 0

0 2 0

0 0 3 ]

(a) Determine the normal component and the magnitude of the tangential components of the traction vector on a plane with unit normal = x + y + z.

(b) Determine also the components of a unit vector in the plane, such that = + .

i think i backed my dad

a true.

answer:

explanation:

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answer:

a

explanation: