Westin Chan answered Osmin Lopez's question 10/29/2012 Can You Help? Starting From Rest, A 12-cm-diameter Compact Disk Takes 3.0 S To Reach Operating Angular Velocity 2000 Rpm. ω = 2000*2π / 60 = 209.4 rad/s Ang. Accel. ∆(ω /t) = 209.4 / 3 = 69.8 rad/s² Torque T = I. ∆(ω /t) = (2.5^-5)(69.8) .. .. ►T = 1.745^-3 Nm
