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Two blocks are placed on a frictionless inclined plane as shown in the figure. There is friction between the blocks. The coefficient of kinetic friction is Uk= 0.14 and that of static friction is Us=0.55. A string is tied to the lower block, and the blocks are pulled up the plane with a force P= 31.5 N due to which the blocks accelerate with an acceleration of a= 0.667 m/s2. If the block m1=2kg does not slip on the block m2=5 kg while the blocks are accelerating together, what will be the magnitude of static friction force between the blocks m1 and m2?

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