A disc of circumference s is at rest at a point A on a horizontal surface when a constant…

Physics · JEE Advanced · NTA Exams — Rotational Motion

A disc of circumference s is at rest at a point A on a horizontal surface when a constant horizontal force begins to act on its centre.
 
 Between A and B there is sufficient friction to prevent slipping, and the surface is smooth to the right of B. AB = s. The disc moves from A to B in time T. To the right of B-

1. the angular acceleration of the disc will disappear; linear acceleration will remain unchanged
2. linear acceleration of the disc will increase
3. the disc will make one rotation in time T/2
4. the disc will cover a distance greater than in further time T

Answer

(B) linear acceleration of the disc will increase, (C) the disc will make one rotation in time T/2, (D) the disc will cover a distance greater than in further time T

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