An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 3.5 rad/s². How long does it take the dryer to come up to speed?

An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 3.5 rad/s². How long does it take the dryer to come up to speed?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 1CQ: (a) What is the angular speed of the second hand of a clock? (b) What is the direction of as you...

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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.

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An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. Starting from rest, the dryer reaches its operating speed with an
average angular acceleration of 3.5 rad/s². How long does it take the dryer to come up to speed?
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