20) A wheel marked with a red dot on the rim starts from rest and undergoes a constant angular acceleration of 2.0 rad/s?. At some point in time, t1, the initial location of the red dot is recorded. At a time, t2, exactly 4.0 seconds later, the red dot has undergone a angular displacement of 180 radians relative to it's location at t1. Determine the time, t1, at which the first recording was made. A) t = 7 seconds B) t = 11 seconds C) t = 17 seconds D) t = 21 seconds E) t = 29 seconds

20) A wheel marked with a red dot on the rim starts from rest and undergoes a constant angular acceleration of 2.0 rad/s?. At some point in time, t1, the initial location of the red dot is recorded. At a time, t2, exactly 4.0 seconds later, the red dot has undergone a angular displacement of 180 radians relative to it's location at t1. Determine the time, t1, at which the first recording was made. A) t = 7 seconds B) t = 11 seconds C) t = 17 seconds D) t = 21 seconds E) t = 29 seconds

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section8.2: Rotational Dynamics

Problem 25PP

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