Classical Dynamics Of Particles And Systems
Classical Dynamics Of Particles And Systems
5th Edition
ISBN: 9788131518472
Author: Stephen T. Thornton, Jerry B. Marion
Publisher: Cengage Learning India
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Chapter 7, Problem 7.1P
To determine

The generalized coordinates and description about the rolling disk.

Expert Solution & Answer
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Answer to Problem 7.1P

The generalized coordinates and description about the rolling disk are given.

Explanation of Solution

In order to describe the rolling of disk without slipping, four generalized coordinates are required. They are – x coordinate, y coordinate, angle θ corresponding to rolling and angle ϕ corresponding to spinning. These are represented in the figure below.

Classical Dynamics Of Particles And Systems, Chapter 7, Problem 7.1P

Equation of motion for the rolling disk is,

    (cosϕ)dx+(sinϕ)dy=Rdθ

Here, tanϕ is dydx.

These equations are not integrable. Moreover, all the generalized coordinates cannot be combined into a single equation. Hence, the constraints are nonholonomic.

Conclusion:

Therefore, generalized coordinates and description about the rolling disk are given.

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