A disk is initially at rest. A penny is placed on it at a distance of 1.7 m from the rotation axis. At time t = 0 s, the disk begins to rotate with a constant angular acceleration of 1.3 rad/s2 around a fixed, vertical axis through its center and perpendicular to its plane. Find the magnitude of the net acceleration of the coin at t = 1.4 s. _______ m/s2

ωf=ωi+αt=0 rad/s+1.3 rad/s21.4 s=1.82 rad/s Tangential acceleration atan=Rα=1.7 m1.3 rad/s2=2.21…

Answered: A disk is initially at rest. A penny is…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter12: Rotation I: Kinematics And Dynamics

Section: Chapter Questions

Problem 82PQ: As a compact disc (CD) spins clockwise as seen from above,information is read from it, starting with...

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A disk is initially at rest. A penny is placed on it at a distance of 1.7 m from the rotation axis. At time t = 0 s, the disk begins to rotate with a constant angular acceleration of 1.3 rad/s²around a fixed, vertical axis through its center and perpendicular to its plane. Find the magnitude of the net acceleration of the coin at t = 1.4 s.

_______ m/s²

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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