Answered: A father is helping his young son learn…

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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Question

A father is helping his young son learn to ride a bike by pushing on the bike seat from the back. At one point, the wheel of the bike is turning with an angular speed of one revolution in 6 seconds. Later, after 20.0 seconds have elapsed, it is turning with an angular speed of 20 revolutions per minute.

First, what is the average angular acceleration of the bicycle wheel in rad/sec² during this time interval?

Second, through what angle did the wheel turn over these twenty seconds?

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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