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The 50-kg crate shown in Fig. 13-6a rests on a horizontal surface for which the coefficient of kinetic friction is Mik = 0.3.
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PSM30° PCos 30° UN Na W- Psimo = 58x9.81-400 Sim30 = 290.5 N. Thet = P los 30 - lle N = 400 Cers 30 -0.34 290.5=259.26 N. ma

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