Question

a block B (m2 = 14 kg) is at rest on top of a table. Block B is connected to block A (m1 = 4.8 kg) and block C (m3 = 17 kg) by two strings that each pass over a frictionless pulley installed at the either end of the table. The horizontal surface of the table exerts a 32-N force of friction on m2. If the system is released from rest, use energy concepts to find the speed of m3 after it moves down 3.0 m.

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