Answer: Torque= tangential force × radius of the pulley
Explanation:
Pulley is a simple machine which helps us to lift loads by applying the force in a convenient direction. It consists of a grooved wheel which is free to rotate about an axle passing through the center of the pulley.
For a pulley, the torque  tangential force × radius of the pulley
 tangential force × radius of the pulley
Pulleys can be used in combination also to achieve a desired output.
 
        
             
        
        
        
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