Torque:

$\overline{){\mathbf{\tau}}{\mathbf{=}}{\mathbf{I}}{\mathbf{\alpha}}}$

Moment of inertia, I = (1/2)mr^{2}

A 250 g, 25-cm-diameter plastic disk is spun on an axle through its center by an electric motor.

What torque must the motor supply to take the disk from 0 to 1600 rpm in 4.8 s?

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