Rotational Kinematics of a disk

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SUMMARY

The discussion focuses on the rotational kinematics of a disk undergoing constant angular acceleration. The disk starts from rest with an initial angle of q0 = -90.0° and reaches a final angle of qf = 130° after 3.15 seconds. To find the angular speed of the disk after completing one full revolution back to -90.0°, the relevant equations of rotational kinematics must be applied, specifically excluding dynamics equations.

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  • Understanding of rotational kinematics equations
  • Familiarity with angular displacement and angular velocity concepts
  • Basic knowledge of angular acceleration
  • Ability to perform calculations involving radians and degrees
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  • Study the equations of rotational kinematics in detail
  • Learn how to convert between degrees and radians for angular measurements
  • Explore examples of constant angular acceleration problems
  • Investigate the relationship between angular velocity and angular displacement
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Students studying physics, particularly those focusing on rotational motion, as well as educators and tutors looking for examples of rotational kinematics applications.

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Homework Statement



A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at q0 = -90.0°. The disk then undergoes constant angular acceleration. After accelerating for 3.15 s, the reference line has been moved part way around the circle (in a counterclockwise direction) to qf = 130°.

Given this information, what is the angular speed of the disk after it has traveled one complete revolution (when it returns to its original position at -90.0°)?

Homework Equations



http://www.ajdesigner.com/phpcircularmotion/centripetal_acceleration_equation.php

The Attempt at a Solution



Not sure I know have to use Rotational Kinematics to find the angular velocity first.
 
Physics news on Phys.org
You have to use only the eqns of Rotational Kinematics, not dynamics.
 

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