1. The problem statement, all variables and given/known data An electric motor can accelerate a Ferris wheel of moment of inertia 11300 kg · m2 from rest to 9.6 rev/min in 14.6 s. When the mo- tor is turned off, friction causes the wheel to slow down from 9.6 rev/min to 8.37 rev/min in 7.23 s. Determine the torque generated by the mo- tor to bring the wheel to 9.6 rev/min. Answer in units of N · m. 2. Relevant equations [tex]\alpha[/tex] = [tex]\omega[/tex]/t [tex]\tau[/tex] = I[tex]\alpha[/tex] 3. The attempt at a solution given: I = 11300 kgm2 [tex]\omega[/tex]o = 0 [tex]\omega[/tex]f = 9.6 rev/min = 1.005309649 rad/s tf = 14.6 s The question asks to determine the torque generated by the motor to bring the wheel to 9.6 rev/min so I think that means I don't have to worry about the motor beign turned off or the friction to slow it down... sooooo... [tex]\alpha[/tex] = [tex]\omega[/tex]/t = (1.005309649 rad/s)/(14.6s) = 0.0688568253 rad/s2 [tex]\tau[/tex] = I[tex]\alpha[/tex] = (11300kgm2)(0.0688568253 rad/s2) = 778.0821257 Nm When I enter this answer, it says it is wrong? What am I doing wrong here? Thank you in advance for your help!