Ted Nugent connects two boxes of his platinum CDs by a massless cord running over a frictionless and massless pulley as shown in the figure.   Box I and its contents has mass 10 kg on the top of the table.  There is a coefficient of kinetic friction of 0.1 between box I and the table.  Box II has a mass of 20 kg. Upload a decent digital photo or scan of your neatly written and diagrammed work for the following: (a) Draw the free-body diagrams for the two boxes, identifying all of the forces acting on each of the masses. (b) Calculate the acceleration of the system. (c) Calculate the tension in the cord.

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.