Q1. A boy sits on a rotating chair (without friction) which is rotating at an angular speed of 2 rev/s. His arms are outstretched and he holds a brick in each hand. The moment of inertia of the system (boy + bricks + chair) in this configuration is 5.0 kg.m^2. He decreased the moment of inertia of the system to 2.5 kg m^2 by moving the bricks. What is the resulting angular speed in rpm units? *

University Physics Volume 1
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ISBN:9781938168277
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Chapter11: Angular Momentum
Section: Chapter Questions
Problem 69P: A gymnast does cartwheels along the floor and then launches herself into the air and executes...
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Q1. A boy sits on a rotating chair
(without friction) which is rotating at
an angular speed of 2 rev/s. His arms
are outstretched and he holds a brick
in each hand. The moment of inertia
of the system (boy + bricks + chair) in
this configuration is 5.0 kg.m^2. He
decreased the moment of inertia of
the system to 2.5 kg m^2 by moving
the bricks. What is the resulting
angular speed in rpm units? *
Transcribed Image Text:Q1. A boy sits on a rotating chair (without friction) which is rotating at an angular speed of 2 rev/s. His arms are outstretched and he holds a brick in each hand. The moment of inertia of the system (boy + bricks + chair) in this configuration is 5.0 kg.m^2. He decreased the moment of inertia of the system to 2.5 kg m^2 by moving the bricks. What is the resulting angular speed in rpm units? *
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