As Shown in the Figure,block B on a Horizontal Tabletop

Short Answer

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 m_A = 12.0 kg,m_B = 7.00 kg,and m_C = 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.