A student sits on a rotating stool holding two 3 kg objects. When his arms are extended horizontally, the objects are 1 m from the axis of rotation and he rotates with an angular speed of 0.7 rad/s. The moment of inertia of the student plus stool 3.2 kg m2 and is assumed to be constant. The student then pulls in the objects horizontally to 0.32 m from the rotation axis. Find the new angular speed of the student. Units: Find the change in rotational energy: Units:

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Chapter1: Units, Trigonometry. And Vectors
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A student sits on a rotating stool holding two 3 kg objects. When his arms are
extended horizontally, the objects are 1 m from the axis of rotation and he rotates
with an angular speed of 0.7 rad/s. The moment of inertia of the student plus stool is
3.2 kg m2 and is assumed to be constant. The student then pulls in the objects
horizontally to 0.32 m from the rotation axis.
Find the new angular speed of the student.
Units:
Find the change in rotational energy:
Units:
Transcribed Image Text:A student sits on a rotating stool holding two 3 kg objects. When his arms are extended horizontally, the objects are 1 m from the axis of rotation and he rotates with an angular speed of 0.7 rad/s. The moment of inertia of the student plus stool is 3.2 kg m2 and is assumed to be constant. The student then pulls in the objects horizontally to 0.32 m from the rotation axis. Find the new angular speed of the student. Units: Find the change in rotational energy: Units:
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