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Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford
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Answer: A computer disk drive is turned on starting from

Chapter 9, Problem 72P

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QUESTION:

Problem 72P

A computer disk drive is turned on starting from rest and has constant angular acceleration. If it took 0.750 s for the drive to make its second complete revolution, (a) how long did it take to make the first complete revolution, and (b) what is its angular acceleration, in rad/s2?

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QUESTION:

Problem 72P

A computer disk drive is turned on starting from rest and has constant angular acceleration. If it took 0.750 s for the drive to make its second complete revolution, (a) how long did it take to make the first complete revolution, and (b) what is its angular acceleration, in rad/s2?

ANSWER:

Step 1 of 2

In the given problem, the computer disk drive rotating with constant angular acceleration take =0.750 s to complete a second complete revolution. Here we need to calculate the time taken to complete the first revolution and angular acceleration in rad per second square.

Given data,

Displacement ,         (second complete revolution)

Time taken for second revolution , =0.750 s

Initial angular speed, =0        (as starts from rest)

To find,

Angular acceleration, =?

Time taken for first complete revolution, =?

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