(Answered) A 4 kg block is kept on a smooth frictionless surface

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A 4 kg block is kept on a smooth frictionless surface. Another block of mass 2 kg is kept above this block. The coefficient of friction between the two blocks n = 0.5. If the lower block (4 kg block) is being pulled by 24 N force, find the force of friction acting between the two blocks.

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