Hello, I have some concept questions , T/F, M/C, I need helpwith. 1. Only orthog

Question

Hello, I have some concept questions , T/F, M/C, I need helpwith. 1. Only orthogonal coordinate systems may be used whenapplying equations of equilibrium. T/F 2. Member deflections must be taken into account when applyingthe equations of equilibrium. T/F 3. When applying equilibrium the following coordinate systemsmay be used: a. Cartesian b. Cylindrical c. Spherical d. All of Above 4. The equation of equilibrium are directly applicable tostresses. T/F (I believe this ones False) 5. A stress orientation can always be found that maximizesnormal stresses and causes shear stresses to be zero. T/F 6. non zero hydrostatic stress results in zero principalstresses. T/F 7. Defn of "Surface Traction" a. electrostatic forces b. forces applied to the volume of a body c. forces resulting only in tension of the body d. forces applied to the surface of a body e. attractive forces between bodies Hello, I have some concept questions , T/F, M/C, I need helpwith. 1. Only orthogonal coordinate systems may be used whenapplying equations of equilibrium. T/F 2. Member deflections must be taken into account when applyingthe equations of equilibrium. T/F 3. When applying equilibrium the following coordinate systemsmay be used: a. Cartesian b. Cylindrical c. Spherical d. All of Above 4. The equation of equilibrium are directly applicable tostresses. T/F (I believe this ones False) 5. A stress orientation can always be found that maximizesnormal stresses and causes shear stresses to be zero. T/F 6. non zero hydrostatic stress results in zero principalstresses. T/F 7. Defn of "Surface Traction" a. electrostatic forces b. forces applied to the volume of a body c. forces resulting only in tension of the body d. forces applied to the surface of a body e. attractive forces between bodies

Explanation / Answer

2.It is not compulsory that we need to take member deflectionsinto account when applying equilibrium equations.so it isfalse. 3.All the above. 4.equilibrium equations can be applied directly by resolvingthem in the co-ordinate systems.so it is true. 5.Normal stress act perpendicular to body and shear stress actperpendicular to body so there is no condition that when normalstress is maximum shear stress will be zero.False. 6.hydrostatic stress means stresses are equal in alldirections.Even in principal stresses also the stresses are greaterthan or equal to otherso they cannot be zero.False. 7.Surface Traction is the Internal forces acting on thesurface.So they are Forces applied to the volume of the body.

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