## anonymous 3 years ago A computer hard disk starts from rest, then speeds up with an angular acceleration of 190rad/s2 until it reaches its final angular speed of 7200rpm. How many revolutions has the disk made 10.0s after it starts up?

1. 3psilon

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2. 3psilon

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3. 3psilon

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4. 3psilon

Divide 9500 by 2pi

5. anonymous

7200 rpm = 754 rad.s/sec $\omega _{f} = \omega _{i} + \alpha t$ $754 = 190t$ t= 4 $\theta = 754*6 + \frac{ 1 }{ 2 } 190*(4^2)$ theta = 4534 + 3039.5 =7563.5 radians =1203 rev.s

6. NotTim

Both wrong still