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knowing the mass of the block (20kg) and the coefficients of friction 0.350 and 0.200 between...

knowing the mass of the block (20kg) and the coefficients of friction 0.350 and 0.200 between the wall and the block. teta angle is 30 degrees, the block is on a vertical line; if we removed the force F and the block is now released from rest, how we can find the acceleration?

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