(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A turntable must spin at 33.3RPM (3.49 rev/s) to play an old fashioned vinyl record. How much torque must the motor deliver if the turntable is to reach its final angular speed in 2 revolutions, starting from rest? The turntable is a uniform disk of diameter .305m and mass 0.22kg.

2. Relevant equations

I = 0.5MR²

[itex]\tau[/itex] = [itex]\alpha[/itex]I

[itex]\alpha[/itex] = (ωf-ωi)/t

3. The attempt at a solution

I=(0.5)(0.22kg)(.1525²)=2.56x10^-3 kgm²

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# Rotational Form of Newton's Second Law - Help

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