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In figure shown below, what is the minimum weight of block B that will remain at rest as a horizontal force P starts motion

In figure shown below, what is the minimum weight of block B that will remain at rest as a horizontal force P starts motion of block A which weights 300 N? (The angle of friction is 15 between A & B while the coefficient of friction is 0.3 between B and the ground). P 30 A B

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