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As shown in the figure,block B on a horizontal tabletop is attached by very light horizontal strings to two hanging blocks,A and C.The pulleys are ideal,and the coefficient of kinetic friction between block B and the tabletop is 0.100.The masses of the three blocks are mA = 12.0 kg,mB = 7.00 kg,and mC = 10.0 kg.Find the magnitude and direction of the acceleration of block B after the system is gently released and has begun to move.
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