A Texas cockroach of mass 0.17 kg runs counterclockwise around the rim of a lazy Susan (a

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A Texas cockroach of mass 0.17 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has radius 15 cm, rotational inertia 5.0 × 10–3 kg · m2, and frictionless bearings. The cockroach's speed (relative to the ground) is 2.0 m/s, and the lazy Susan turns clockwise with angular speed ω0 = 2.8 rad/s. The cockroach finds a bread crumb on the rim and, of course, stops.
(a) What is the angular speed of the lazy Susan after the cockroach stops?
(b) Is mechanical energy conserved as it stops?

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Fundamentals of Physics

ISBN: 978-0470469118

9th Edition

Authors: Jearl Walker, Halliday Resnick

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