Answered: A wheel, originally turning at 14…

A wheel, originally turning at 14 radians/sec undergoes an angular acceleration of -1.7 radians/sec2 for 5 seconds. How many revolutions does it turn the during 5 seconds?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 9CQ: Explain why centripetal acceleration changes the direction of velocity in circular motion but not...

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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

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A wheel, originally turning at 14 radians/sec
undergoes an angular acceleration of -1.7
radians/sec? for 5 seconds. How many
revolutions does it turn the during 5
seconds?
Hint: Every 2 radians = 1 revolutions
Give your answer in revolutions to 1 decimal
place.

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