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Physics 23 Online
OpenStudy (anonymous):

A block with mass m1 = 9.0 kg is on an incline with an angle θ = 26.0° with respect to the horizontal. static friction of m1 is 0.236721. Now a new block is attached to the first block. The new block is made of a different material and has a coefficient of static friction μ = 0.73. What minimum mass is needed to keep the system from accelerating?

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