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

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

[This problem is calculation intensive]
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.
4y
A) t = 7 seconds
B) t = 11 seconds
C) t = 17 seconds
D) t = 21 seconds
E) t = 29 seconds

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