A block of mass 4 kg lies over a horizontal surface g 10 m s 2 Another block of mass 2 kg is placed over the first block The

Question

A block of mass 4 kg lies over a horizontal surface g 10 m s 2 Another block of mass 2 kg is placed over the first block The normal reaction between the first block and ground surface is 1 40 N 3 20 N 2 60 N 4 10 N

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