A string that passes over a pulley has a 0.341 kg mass attached to one end and a 0.625 kg mass attached to the other end. The pulley, which is a disk of radius 9.00 cm , has friction in its axle. What is the magnitude of the frictional torque that must be exerted by the axle if the system is to be in static equilibrium? (Answer should be in N m)

The frictional torque is

Explanation:

From the question we are told that

   The mass attached to one end the string is

   The mass attached to the other end of the string is  

    The radius of the disk is  

At equilibrium the tension on the string due to the first mass is mathematically represented as

substituting values

At equilibrium the tension on the string due to the  mass is mathematically represented as

The  frictional torque that must be exerted is mathematically represented as

substituting values  

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