A disk of radius 14 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.9 rad/s?. What are the following values at t = 7.0 s? (a) the angular velocity of the disk rad/s (b) the tangential acceleration a, and the centripetal acceleration a, of a point at the edge of the disk m/s2 = le a. = m/s2 eBook

A disk of radius 14 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.9 rad/s?. What are the following values at t = 7.0 s? (a) the angular velocity of the disk rad/s (b) the tangential acceleration a, and the centripetal acceleration a, of a point at the edge of the disk m/s2 = le a. = m/s2 eBook

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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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A disk of radius 14 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.9 rad/s2. What are the following values at t = 7.0 s?
(a) the angular velocity of the disk
rad/s
(b) the tangential acceleration a, and the centripetal acceleration a, of a point at the edge of the disk
at =
m/s2
a. =
m/s2
eBook

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