Question

FIGURE 4-32 Example 4–20. 5.0 kg A B 2.0 kg (a) EN FT FT A B mag (b) MBg (c)two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between box A and the table is 0.31. Ignore the mass of the cord and the pulley friction. In this case we can assume that the force applied to one end of the cord will have the same magnitude at the other end. Find a) acceleration, b) the Tension force FT in the cord. Assume box A is twice the mass of box B = 2.31_kg.

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a 5.0kg the = 0.31 N 2.0kg ta a T 16 4 ef sg ta fr- u5g 42g T=2a -bre T-sleg=sa ag - 5x8.31xg =7a = 0.63ms 2 a = 4 .41 7 T =

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