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A disk is uniformly accelerated from rest with angular acceleration a. The magnitude of the linear acceleration of a point on the rim of the disk (a) grows with the time t as (A) t (B) t 2 (C) t 3 (D) t 4 for at2 (b) grows as (A) t (B) t 2 (C) t3 (D) t 4 for at 2 » 1.
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