Consider the system shown in Fig. P6.86. The rope and pulley have negligible mass, and the pulley is frictionless. Initially the 6.00-kg block is moving downward and the 8.00-kg block is moving to the right, both with a speed of 0.900 m/s. The blocks come to rest after moving 2.00 m. Use the work€“energy theorem to calculate the coefficient of kinetic friction between the 8.00-kg block and the tabletop.

Figure P6.86: 

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8.00 kg 6.00 kg