A disk with a radius of 4.5 m has a 170-N force applied to its outer edge at two different angles (see figure below). The disk has a rotational inertia of 143 kg m.4.5 m4.5 m70Case 1Case 2(a) What is the magnitude of the torque applied to the disk in case 1?N m(b) What is the magnitude of the torque applied to the disk in case 2?N: m(c) Assuming the force on the disk is constant in each case, what is the magnitude of the angular acceleration applied to the disk in each case?2Case 1rad/s?rad/s2Case 2(d) Which case is a more effective way of spinning the disk?O case 1О case 2Both methods are equally effective.

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Answered: A disk with a radius of 4.5 m has a…

A disk with a radius of 4.5 m has a 170-N force applied to its outer edge at two different angles (see figure below). The disk has a rotational inertia of 143 kg m. n2

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter12: Rotation I: Kinematics And Dynamics

Section: Chapter Questions

Problem 57PQ

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Question

A disk with a radius of 4.5 m has a 170-N force applied to its outer edge at two different angles (see figure below). The disk has a rotational inertia of 143 kg m.
4.5 m
4.5 m
70
Case 1
Case 2
(a) What is the magnitude of the torque applied to the disk in case 1?
N m
(b) What is the magnitude of the torque applied to the disk in case 2?
N: m
(c) Assuming the force on the disk is constant in each case, what is the magnitude of the angular acceleration applied to the disk in each case?
2
Case 1
rad/s?
rad/s2
Case 2
(d) Which case is a more effective way of spinning the disk?
O case 1
О case 2
Both methods are equally effective.

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