Your answer is partially correct. Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg-m2 about its central axis, is set spinning counterclockwise (which may be taken as the positive direction) at 140 rev/min. The second disk, with rotational inertia 7.60 kg•m² about its central axis, is set spinning counterclockwise at 941 rev/min. They then couple together. (a) What is their angular speed after coupling? If instead the second disk is set spinning clockwise at 941 rev/min, what are their (b) angular velocity (using the correct sign for direction) and (c) direction of rotation after they couple together? (a) Number i 77.24 Units N-m/rad (b) Number i -69.82 Units rev/s (c) clockwise
Your answer is partially correct. Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg-m2 about its central axis, is set spinning counterclockwise (which may be taken as the positive direction) at 140 rev/min. The second disk, with rotational inertia 7.60 kg•m² about its central axis, is set spinning counterclockwise at 941 rev/min. They then couple together. (a) What is their angular speed after coupling? If instead the second disk is set spinning clockwise at 941 rev/min, what are their (b) angular velocity (using the correct sign for direction) and (c) direction of rotation after they couple together? (a) Number i 77.24 Units N-m/rad (b) Number i -69.82 Units rev/s (c) clockwise
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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Can you help me with this problem. The ones that has the red lines.
Transcribed Image Text:Your answer is partially correct.
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought
together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg-m2 about its central
axis, is set spinning counterclockwise (which may be taken as the positive direction) at 140 rev/min. The second disk,
with rotational inertia 7.60 kg•m² about its central axis, is set spinning counterclockwise at 941 rev/min. They then
couple together. (a) What is their angular speed after coupling? If instead the second disk is set spinning clockwise at
941 rev/min, what are their (b) angular velocity (using the correct sign for direction) and (c) direction of rotation
after they couple together?
(a) Number
i
77.24
Units
N-m/rad
(b) Number
i
-69.82
Units
rev/s
(c)
clockwise
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