In this problem, consider the figure below. A disk with radius r, mass m, and moment of inertia of Io about the point O is on an inclined plane, with the translational coordinates and y and rotation angle 0, as shown. The direction of gravity is shown, and the incline angle is a. A constant input torque is applied at the point O in the direction shown, and it is opposed by a damping torque from a bearing with value ce in the direction shown. The point P represents a point of instantaneous contact, rolling without slipping.

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
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In this problem, consider the figure below. A disk with radius r, mass m, and moment of inertia of Io about the point O is
on an inclined plane, with the translational coordinates and y and rotation angle 0, as shown. The direction of gravity is
shown, and the incline angle is a. A constant input torque is applied at the point O in the direction shown, and it is opposed
by a damping torque from a bearing with value co in the direction shown. The point P represents a point of instantaneous
contact, rolling without slipping.
Your tasks:
Direction of
Gravity
M(t)
co
0
P
x
Mass: m
Figure 2: System schematic.
Moment of Inertia
about 0: lo
a: Incline Angle
A Draw the FBD for the disk.
B Derive the equation of motion with the rotation angle as the dynamic variable.
0
C Take the Laplace transform, and solve for (s), letting the initial conditions be 0(0) = 0 and (0) = 0. Remember that
a constant is a step function for a one-sided Laplace transform.
D Given your expression for (s), find the Laplace transform of the angular velocity, (s)
E Assuming the plane is quite long, what is the terminal angular velocity (the final value of the angular velocity) of the
disk, was?
Transcribed Image Text:I In this problem, consider the figure below. A disk with radius r, mass m, and moment of inertia of Io about the point O is on an inclined plane, with the translational coordinates and y and rotation angle 0, as shown. The direction of gravity is shown, and the incline angle is a. A constant input torque is applied at the point O in the direction shown, and it is opposed by a damping torque from a bearing with value co in the direction shown. The point P represents a point of instantaneous contact, rolling without slipping. Your tasks: Direction of Gravity M(t) co 0 P x Mass: m Figure 2: System schematic. Moment of Inertia about 0: lo a: Incline Angle A Draw the FBD for the disk. B Derive the equation of motion with the rotation angle as the dynamic variable. 0 C Take the Laplace transform, and solve for (s), letting the initial conditions be 0(0) = 0 and (0) = 0. Remember that a constant is a step function for a one-sided Laplace transform. D Given your expression for (s), find the Laplace transform of the angular velocity, (s) E Assuming the plane is quite long, what is the terminal angular velocity (the final value of the angular velocity) of the disk, was?
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