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I'm stumped on just one question and not sure where to go with it now. Any help would be greatly appreciated...

Question:

**Calculate the angular acceleration and angular velocity of a 2kg object rotating in a circle of 1.5m radius in a time of 3s.**

My first answer i realise now was wrong due to calculating linear velocity

Second answer:

ω=3*(2∏)

^{2}=

**6∏ rad/s**

∴ α=ω

^{2}r=(6∏)

^{2}*1.5=

**532.96 rad/s**

^{2}Can anyone offer some assistance on where i'm going wrong here please?