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4. The crate has a mass of 150 kg and rests on a surface for which the coefficients of static and kinetic friction s

4. The crate has a mass of 150 kg and rests on a surface for which the coefficients of static and kinetic friction s = 0.3 are k = 0.2, respectively. If the motor M supplies a cable force of F = (81 + 20) N where t is in seconds, determine the power output developed by the motor when t = 5 s. Q4: M

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