Constants I Periodic Table A student sitting on a frictionless rotating stool has rotational inertia 0.85 kg -m2 about a vertical axis through her center of mass when her arms are tight to her chest. The stool rotates at 6.95 rad/s and has negligible mass. The student extends her arms until her hands, each holding a 4.8 kg mass, are 0.73 m from the rotation axis Part A lgnoring her arm mass, what's her new rotational velocity? Express your answer to two significant figures and include the appropriate units. Value Units Request Answer Submit Part B Repeat if each arm is modeled as a 0.73 m long uniform rod of mass of 4.7 kg and her total body mass is 58 kg. Express your answer to two significant figures and include the appropriate units. HA ? Value Units Submit Request Answer

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter10: Rotation Of A Rigid Object About A Fixed Axis
Section10.5: Analysis Model: Rigid Object Under A Net Torque
Problem 10.5QQ: You turn off your electric drill and find that the time interval for the rotating bit to come to...
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Constants I Periodic Table
A student sitting on a frictionless rotating stool has rotational
inertia 0.85 kg -m2 about a vertical axis through her center of
mass when her arms are tight to her chest. The stool rotates at
6.95 rad/s and has negligible mass. The student extends her
arms until her hands, each holding a 4.8 kg mass, are 0.73 m
from the rotation axis
Part A
lgnoring her arm mass, what's her new rotational velocity?
Express your answer to two significant figures and include the appropriate units.
Value
Units
Request Answer
Submit
Part B
Repeat if each arm is modeled as a 0.73 m long uniform rod of mass of 4.7 kg and her total body mass is 58 kg.
Express your answer to two significant figures and include the appropriate units.
HA
?
Value
Units
Submit
Request Answer
Transcribed Image Text:Constants I Periodic Table A student sitting on a frictionless rotating stool has rotational inertia 0.85 kg -m2 about a vertical axis through her center of mass when her arms are tight to her chest. The stool rotates at 6.95 rad/s and has negligible mass. The student extends her arms until her hands, each holding a 4.8 kg mass, are 0.73 m from the rotation axis Part A lgnoring her arm mass, what's her new rotational velocity? Express your answer to two significant figures and include the appropriate units. Value Units Request Answer Submit Part B Repeat if each arm is modeled as a 0.73 m long uniform rod of mass of 4.7 kg and her total body mass is 58 kg. Express your answer to two significant figures and include the appropriate units. HA ? Value Units Submit Request Answer
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