Ratational Dynamics- PLEASE HELP

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To calculate the torque needed to keep a 650-gram ball rotating in a horizontal circle of radius 1.2 m at a constant angular velocity, the air resistance force of 0.020 N must be considered. The moment of inertia has been determined, but further guidance is needed to proceed with the calculation. The relevant torque equation, T = Iα, is noted, but the user is unsure how to apply it in this context. The discussion emphasizes the importance of calculating the torque due to air resistance to solve the problem effectively. Clarification on the next steps in the calculation process is requested.
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Homework Statement


A small 650 gram ball on the end of a thin light cord is rotated in a horizontal circle of radius 1.2 m. Calculate the torque needed to keep the ball rotating at a constant angular velocity if air resistance exerts a ofrce of 0.020 N. Ignore the rod's moment of intertia and air resistance.


Homework Equations



T= Ia(alpha)

The Attempt at a Solution



Well I found the moment of inertia but I am stuck on where to go next. Please help me!
 
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calculate the torque due to the air resistance using your other equation for torque
 

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