A uniform disc of mass M and radius R, is resting on a table on its rim. The coefficient of friction between disc and table is 
Now the disc is pulled with a force F as
shown in the figure. What is the maximum value of F for which the disc rolls without slipping?
A
Mg
B
2 
Mg
Mg
C
3 
Mg
Mg
D
4 
Mg
Mg
Text Solution
Verified by ExpertsThe correct answer is:
C
: Let a be the acceleration of the centre of mass of disc. Then
Ma = F = f …(i)
If there is no slipping, angular acceleration ofj the disc.
….(ii)
Now torque of the disc 
or 
(using (ii))
Substituting this in Eq. (i), we get,
or 
Since there is no slipping,
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