The plank AB has a mass of 7 kg. The rollers D and E are each of mass 5kg and are 0.5 m in diameter. The plank is released from rest with roller D under the end A and the roller E, under the mass center C. assuming no slipping, determine the velocity of the plank when roller E is under end B.

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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.