Physics

Physics

Problem

A computer disk initially spins at

7200\,\text{rpm}

. Over the next

5.0\,\text{s}

it slows with an average angular acceleration of

-12\,\text{rad/s}^{2}

. What is the disk’s angular velocity after

5.0\,\text{s}

? a)

8.1\times10^{2}\,\text{rad/s}

b)

6.0\times10^{2}\,\text{rad/s}

c)

6.9\times10^{2}\,\text{rad/s}

d)

7.5\times10^{2}\,\text{rad/s}

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