Two Boxes Are Connected by a Weightless Cord Running Over

question 105

Essay

Two boxes are connected by a weightless cord running over a very light frictionless pulley as shown in the figure. Box A,of mass 8.0 kg,is initially at rest on the top of the table.The coefficient of kinetic friction between box A and the table is 0.10. Box B has a mass of 15.0 kg,and the system begins to move just after it is released.
(a) Draw the free-body diagrams for each of the boxes,identifying all of the forces acting on each one.
(b) Calculate the acceleration of each box.
(c) What is the tension in the cord?

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