Please help me solve this A student sits on a freely rotating stool holding two dumbbells, each of mass 3.10 kg (see figure below). When his arms are extended horizontally (Fiqure a), the dumbbells are 0.99 mfrom the axis of rotation and the student rotates with an angular speed of 0.749 rad/s. The moment of inertia of the student plus stool is 2.76 kg - m2 and is assumed to be constant. Thestudent pulls the dumbbells inward horizontally to a position 0.308 m from the rotation axis (Figure b).ab(a) Find the new angular speed of the student.The words 'freely rotating stool' mean that there are no external torques applied. What is conserved in this case? rad/s(b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward.2.352What is the moment of inertia of two 3.10 kg dumbbells, each a distance 0.99 from the axis of rotation?= 5.891arter you cannot assume that kinetic energy is conserved here, so you must calculate the final kinetic energy from your previous results. JKbefore

When the boy rotates the angular momentum of the syster remains constant. I*w = constant. So I2/I1…

A student sits on a freely rotating stool holding two dumbbells, each of mass 3.10 kg (see figure below). When his arms are extended horizontally (Fiqure a), the dumbbells are 0.99 m from the axis of rotation and the student rotates with an anqular speed of 0.749 rad/s. The moment of inertia of the student plus stool is 2.76 kg - m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.308 m from the rotation axis (Figure b). a (a) Find the new angular speed of the student. The words 'freely rotating stool' mean that there are no external torques applied. What is conserved in this case? rad/s (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward. 2.352 What is the moment of inertia of two 3.10 kg dumbbells, each a distance 0.99 from the axis of rotation? J Kbefore = 5.891 arter You cannot assume that kinetic energy is conserved here, so you must calculate the final kinetic energy from your previous results. J

A student sits on a freely rotating stool holding two dumbbells, each of mass 3.10 kg (see figure below). When his arms are extended horizontally (Fiqure a), the dumbbells are 0.99 m from the axis of rotation and the student rotates with an anqular speed of 0.749 rad/s. The moment of inertia of the student plus stool is 2.76 kg - m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.308 m from the rotation axis (Figure b). a (a) Find the new angular speed of the student. The words 'freely rotating stool' mean that there are no external torques applied. What is conserved in this case? rad/s (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward. 2.352 What is the moment of inertia of two 3.10 kg dumbbells, each a distance 0.99 from the axis of rotation? J Kbefore = 5.891 arter You cannot assume that kinetic energy is conserved here, so you must calculate the final kinetic energy from your previous results. J

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 56P: A student sits on a freely rotating stool holding two dumbbells, each of mass 3.00 kg (Fig. P10.56)....

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