7. Two discs are initially spinning in opposite directions. The upperdisc has rotational inertia of 10kgm² and a rotation rate of 12rad/s.The lower disc has rotational inertia of 25kgm? and a rotation rate of8rad/s. The upper disc is dropped onto the lower disc and they sticktogether. What is the rotation rate AND direction of the two discsystem?Disk 2Disk 1(a)(b)

Write the given values. Consider the counter-clockwise rotation rate of the disc as positive and the…

7. Two discs are initially spinning in opposite directions. The upper disc has rotational inertia of 10kgm? and a rotation rate of 12rad/s. The lower disc has rotational inertia of 25kgm² and a rotation rate of 8rad/s. The upper disc is dropped onto the lower disc and they stick together. What is the rotation rate AND direction of the two disc system?

7. Two discs are initially spinning in opposite directions. The upper disc has rotational inertia of 10kgm? and a rotation rate of 12rad/s. The lower disc has rotational inertia of 25kgm² and a rotation rate of 8rad/s. The upper disc is dropped onto the lower disc and they stick together. What is the rotation rate AND direction of the two disc system?

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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2. Two students perform a simple experiment. The first student observes the orientation of a stationary disk with a single mark on the edge of the rim. He then looks away. The secondstudent then gives the disk a constant rotational acceleration of 3.0 rad/s2 for a time of 4.0 seconds; she then brings the disk to a halt with constant angular acceleration in a time of 0.10 s. The first student is now allowed to look at the disk again. (a) From the point of view of the first student, through what angle did the disk move? (b) What was the average angular velocity of the disk?
5. The disk has an angular acceleration a = 8 rad/s' and angular velocity w = 3 rad/s at the instant shown. If it does not slip at A, determine the magnitude and direction of the acceleration of point B. w = 3 rad/s a = 8 rad/s? 45° 0.5 m 45° B
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1. The angular acceleration of a rotating wheel is given by a=-0.1o2 rad/s, and the wheel's initial angular velocity is wn = 25 rad/s at t= 0. Determine the time t when the wheel's angular velocity is reduced to o = 4 rad/s.
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