Youstand on a turn-table witharms extended out horizontally, asshown in the figure below. In each hand, she holds an 8 kg weight. In this initial state, yourprofessor and the turn-table are rotating at a constant rate of 9 rpm. Note that each weight isheld 85 cm from the axis of rotation.Your professor brings her arms, and the weights, inwards towards her axis of rotation, asshown in the figure. What is the final rotational speed, in rpm, of your professor on the turn-table? You can assume that the weights are located on the axis of rotation in this final state.WiWtinitalrinalStatestüteThe turn-table has a moment of inertia of 0.31 kg m^2. Yourmated as a solid cylinder of uniform density with a mass of 65 kg and a radius of 16 cm. Youcan neglect the mass of the arms. assume that the weights canbe approximated as point masses.body can be approxi-

The mass of the weight m = 8 kg the length of the arm r =0.85 m The initial rotating speed = 9 rpm…

in the figure below. In each hand, she holds an 8 sor and the turn-table are rotating at a constant ra 5 cm from the axis of rotation. rofessor brings her arms, and the weights, inward: in the figure. What is the final rotational speed, in You can assume that the weights are located on th

in the figure below. In each hand, she holds an 8 sor and the turn-table are rotating at a constant ra 5 cm from the axis of rotation. rofessor brings her arms, and the weights, inward: in the figure. What is the final rotational speed, in You can assume that the weights are located on th

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

You
stand on a turn-table with
arms extended out horizontally, as
shown in the figure below. In each hand, she holds an 8 kg weight. In this initial state, your
professor and the turn-table are rotating at a constant rate of 9 rpm. Note that each weight is
held 85 cm from the axis of rotation.
Your professor brings her arms, and the weights, inwards towards her axis of rotation, as
shown in the figure. What is the final rotational speed, in rpm, of your professor on the turn-
table? You can assume that the weights are located on the axis of rotation in this final state.
Wi
Wt
inital
rinal
State
stüte
The turn-table has a moment of inertia of 0.31 kg m^2. Your
mated as a solid cylinder of uniform density with a mass of 65 kg and a radius of 16 cm. You
can neglect the mass of the arms. assume that the weights can
be approximated as point masses.
body can be approxi-

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