Answered: Started from rest, the two wheels of a…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And The Law Of Gravity

Section: Chapter Questions

Problem 1P: Angular Speed and Angular Acceleration (a) Find the angular speed of Earths rotation about its axis....

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Question

Started from rest, the two wheels of a mountain bike have both an angular acceleration of 4.0 rad/s². What is its angular speed at the instant when one has made 10 revolutions?

A. 16 rad/s.

B. 22 rad/s.

C. 32 rad/s.

D. 250 rad/s.

E. 500 rad/s

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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