A spool of mass M = 3 kg and radius R = 20 cm has an axle of radius r = 10 cm around which a string is wrapped. The moment of inertia about an axis perpendicular to the plane of the spool and passing through the centre is 
. If the coefficient of friction between the surface and the spool is 0. 4 then the maximum tension which can be applied to the string for which the spool doesn't slip, is [g = 10 m s -2 ]
Text Solution
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18 N
Writing the torque about the instantaneous axis of rotation we get,
Also,
Substituting the values and solving for T we get,
T= 18 N
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