Physics

Problem

Disc A is rotating at

10\,\text{rad s}^{-1}

and is slowing down uniformly with angular deceleration

0.5\,\text{rad s}^{-2}

. At the same instant, Disc B located at the same origin starts from rest and accelerates uniformly at

1\,\text{rad s}^{-2}

in the same sense of rotation. After how much time will the two discs have turned through the same angular displacement from the common starting position? a)

6.7\,\text{s}

13.3\,\text{s}

10\,\text{s}

20\,\text{s}

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