During a gym session, Ayanda sits on a freely rotating stool holding two dumbbells, each of mass 2.50 kg as shown in Figure 2. When his arms are extended horizontally, the dumbbells are 0.900 m from the axis of rotation and Ayanda rotates with an angular speed of 0.675 rad/s. His moment of inertia plus stool is 4.00 kg · m2 and is assumed to be constant. Ayanda pulls the dumbbells inward horizontally to a position 0.300 m from the rotation axis. Find his new angular speed and the change in kinetic energy of the rotating system using I = mr2 for dumbbells.
During a gym session, Ayanda sits on a freely rotating stool holding two dumbbells, each of mass 2.50 kg as shown in Figure 2. When his arms are extended horizontally, the dumbbells are 0.900 m from the axis of rotation and Ayanda rotates with an angular speed of 0.675 rad/s. His moment of inertia plus stool is 4.00 kg · m2 and is assumed to be constant. Ayanda pulls the dumbbells inward horizontally to a position 0.300 m from the rotation axis. Find his new angular speed and the change in kinetic energy of the rotating system using I = mr2 for dumbbells.
An Introduction to Physical Science
14th Edition
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Chapter3: Force And Motion
Section: Chapter Questions
Problem 2FIB: Forces are ___ quantities. (3.1)
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During a gym session, Ayanda sits on a freely rotating stool holding two dumbbells, each
of mass 2.50 kg as shown in Figure 2. When his arms are extended horizontally, the
dumbbells are 0.900 m from the axis of rotation and Ayanda rotates with an angular
speed of 0.675 rad/s. His moment of inertia plus stool is 4.00 kg · m2 and is assumed to
be constant. Ayanda pulls the dumbbells inward horizontally to a position 0.300 m from
the rotation axis. Find his new angular speed and the change in kinetic energy of the
rotating system using I = mr2
for dumbbells.
Transcribed Image Text:Figure 2: Ayanda holding dumbbells
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