A homogeneous block, of mass m, is supported in the way indicated, by means of supports and rollers, the mass of which is negligible. At a certain point, support B suddenly gives way. Find at this time: a) The values of the reaction in A b) The acceleration of point A.

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.