Two blocks A and B of masses 10 kg and 15 kg are placed in contact with each other rest on a rough horizontal surface as shown in the figure. The coefficient of friction between the blocks and surface is 0.2. A horizontal force of 200 N is applied to block A. The acceleration of the system is:
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: Here Mass of block A,
Mass of block B, 
Coefficient of friction between the blocks and the surface, 
Applied force =200N
Force of friction on
Force of friction on
Taking two blocks forming one system, therefore net force acting on the blocks is
Let a be common acceleration of the system
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