Answered: A rotating disk speeds up from 3 rad/s…

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A rotating disk speeds up from 3 rad/s to 5 rad/s in 0.2 s. What is the disk's average angular acceleration?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter10: Rotational Motion And Angular Momentum

Section: Chapter Questions

Problem 3PE: Integrated Concepts You have a grindstone (a disk) that is 90.0 kg, has a 0.340-m radius, and is...

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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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Exercise 1. Solve the following problems.
1. A rotating disk speeds up from 3 rad/s to 5 rad/s in 0.2 s. What is the disk's average angular acceleration?

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