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A disc rotates about the central axis st...

A disc rotates about the central axis starting from rest and accelerates with constant angular acceleration. At one time, it is rotating at `10 rps` , `60` revolution later, its angular speed is `15rps`. Calculate (i) angular acceleration (ii) time required to complete `60` revolutions (iii) the time required to reach `10 rev//sec` angular speed and (iv) number of revolutions from rest until the time the disc reaches `10rps` angular speed.

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(a) `1.0rev//s^(2)`, (b) 4.8 s, ( c) 9.6 s, (d) 48 rev
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