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.
I = 0.5MR²
[itex]\tau[/itex] = [itex]\alpha[/itex]I
[itex]\alpha[/itex] = (ωf-ωi)/t
The Attempt at a Solution