There are basically two approaches to to analyse the structure, namely static approach and kinematic approach. Static approach is based on force method of analysis; dealing with the flexibility coefficients on other hand in kinematic approach deals with stiffness coefficients and practiced as Displacement Method.
So now the question is that which method will save your more time while approaching varieties of problems manually? In other words, which approach is better to be followed between static approach and kinematic approach prior to evaluation of internal forces ( axial forces, shearing forces, bending moments, twisting moments) and internal deformations (axial strains, lateral strains, shearing strain, slope, deflections, twists)? And the answer is, which way you will face lesser calculations more technically the approach with lesser degree of indeterminacy, this means that if you are getting static degree of indeterminacy lesser than kinematic degree of indeterminacy prefer static approach (Force Method), if you are getting kinematic degree of indeterminacy less than static degree of indeterminacy prefer kinematic approach ( Displacement Method) and you will end up with less number of equations to work out. You might have experience this behaviour when you'll solve any statically determinate structures (either static or kinematic).
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