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A uniform chain of mass m0 and length l ...

A uniform chain of mass `m_0` and length l rests on a rough incline with its part hanging vertically as shown in the fig. The chain starts sliding up the incline (and hanging part moving down) provided the hanging part equals `eta` times the chain length (`eta` lt 1). What is the work performed by the friction force by the time chain slides completely off the incline. Neglect the dimension of pulley and assume it to be smooth.

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