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Kinetic Friction and Tension in a String

A 9 kg hanging weight is connected to a string over a pulley to a 5Kg block that is sliding on a flat table. If the coefficient of kinetic friction is 0.15, find the tension in the string.

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A figure of the system is drawn in the attached document.

If we take the direction of the acceleration (a) as the positive direction - all the forces ...

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