What acceleration should a person with a mass of m = 70

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What acceleration should a person with a mass of m = 70 kg walk along a long board with a mass of M = 5 kg lying on an inclined plane with an angle at the base of 10 ° so that the board glides uniformly downwards? The coefficient of friction between the board and the surface of the plane is 0.3.

Task 11197. Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
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