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A wheel of radius 20 cm is initially rotating at 12 rpm. It then speeds up...

A wheel of radius 20 cm is initially rotating at 12 rpm. It then speeds up at a constant rate, reaching a speed of 35 rpm after 3.1 seconds.

a)What is the angular acceleration of the disk?

b)How much does it rotate (in radians) while it is accelerating from 12 to 35 rpm?

c)What is total acceleration (in m/s 2 ) of a point on the edge of the disk at the moment it has just started accelerating?

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