Answered: Please answer and explain. 1. A…

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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Please answer and explain.

1. A uniform disk with moment of inertia at the center of mass, I1, is rotating with an initial angular speed ω1 about a frictionless shaft through its center. Another disk of moment of inertia at the center of mass, I2, is dropped from rest on top of the first disk through the same shaft. Give the angular speed of the composite two-disk system assuming that the collision is perfectly inelastic.

2. Is the total energy of the rotating disk conserved in the experiment? Justify your answer using the data in Table W4.

3. In the collision of disks, the system is not isolated because of the existence of friction. How is it possible that conservation of angular momentum is still valid to a relatively good accuracy?

Verification of conservation of energy
Table W4: Data for verification of conservation of energy
Trial
Ki (J)
Kf (J)
AEmech (J)
W friction (J)
% Error
1
0.139
0.0939
0.0451
-0.0447
0.887% =
0.9%
0.175
0.1343
0.0406
-0.0405
0.246% =
0.2%
3.
0.125
0.0945
0.0302
-0.0300
1.99%- 2%
Average percent error
1.03% 1%

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