Two block of masses m(1) and m(2) connec...

Two block of masses `m_(1)` and `m_(2)` connected by a light spring rest on a horizontal plane. The coefficient of friction between the block and the surface is equal to `mu`. What minimum constant force has to be applied in the horizontal direction to the block of mass `m_(1)` in order to shift the other block?

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15 N

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25 N

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