A board of mass m = 1 kg lies on a table...

A board of mass m = 1 kg lies on a table and a weight of M = 2 kg on the board. What minimum force F must be applied on the board in order to pull it out from under the road ? The coefficient of friction between board and table is `mu_(2) = 0.5` : (Take `g = 10 m//s^(2)`)

7.5 N

15 N

22.5 N

30 N

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