A circular disk of mass 0.5 kg and radius 21 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.5 rad/s. a) Find the new angular velocity of the combination; 2.7 rad/s b) The change in the kinetic energy? 0 J c) If the motor is switched on after the disk has landed, what is the constant torque needed to regain the original speed in 3 s? 0.013 N*m

A circular disk of mass 0.5 kg and radius 21 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.5 rad/s. a) Find the new angular velocity of the combination; 2.7 rad/s b) The change in the kinetic energy? 0 J c) If the motor is switched on after the disk has landed, what is the constant torque needed to regain the original speed in 3 s? 0.013 N*m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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