Statement I : A disc is rolling on a rough horizontal surface. The instantaneous speed of the point of contact during perfect rolling is zero with respect to ground.Statement II : The force of friction can help in achieving pure rolling condition.
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a
If both statement I and statement II are true and statement II is the correct explanation of statement I.
b
If both statement I and statement II are true but statement II is not the correct explanation of statement I.
c
If statement I is true but statement II is false
d
If both statement I and statement II are false
answer is B.
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Detailed Solution
Velocity of point of contact V = (VCM-ωR)Hence V = 0.Also frictional force can provide torque which further helps in achieving the pure rolling condition.