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Chapter 8-Part 2 A large grinding wheel in the shape of a solid cylinder of radius 0.33 meter is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 0,94 rad/s2. (a) What is the torque being applied to the wheel? (b) What is the moment of inertia of the wheel? ANS: (a) 82.5 Nm; (b) 87.8 kg-m2 A 2,000 kg Ferris wheel accelerates from rest to an angular speed of 2 rad/s in 12 s. Approximate the Ferris wheel as a circular disk with a radius of 30 m. (a) What is the moment of inertia of the wheel? (b) What is the angular acceleration of the wheel? (c) What is the net torque on the wheel? ANS: (a) 9x10 kg-m2; (b) 0.17 rad/s; (c) 1.53x10 Nm
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