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21 June, 23:10

A DVD is initially at rest so that the line PQ on the disks surface is along the + x-axis. The disc begins to turn with a constant LaTeX: / alpha_zα z = 5.0 rad/s2. At t = 0.40 s, what is the angle between the line PQ and the + x-axis

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  1. 22 June, 01:02
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    theta = 1/2 alpha t^2 = 0.5*5*0.4^2 = 0.4 rad
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