How Do You Calculate Angular Acceleration from RPMs?

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Homework Help Overview

The discussion revolves around calculating angular acceleration from a given RPM value, specifically in the context of a power drill reaching 13164 RPM in 1.01 seconds. Participants are attempting to understand the conversion from RPM to radians per second and how to apply that to find angular acceleration.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to convert RPM to radians per second and calculate angular acceleration but expresses confusion about the process. Some participants question the completeness and accuracy of the problem as presented, while others suggest that the source may not be reliable.

Discussion Status

The discussion is ongoing, with participants exploring the validity of the problem and questioning the provided answer. There is a lack of consensus on the correctness of the problem setup and the answer given, leading to further inquiry.

Contextual Notes

Participants note discrepancies in the answers provided by the source of the problem, indicating potential issues with the problem's integrity. The original poster has referenced a practice problem site, which has raised concerns about the reliability of the information.

ginaoh
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Can someone walk me through this problem?

A power drill reaches 13164 rpm in 1.01 seconds. What is the angular acceleration?

The answer listed is 3.791 rad/s2, but I don't know how to get there.

So far, I did (13164 rev x 2pi)/60 seconds to get 1378.5 rad/s (which is 'w', right)? but change in 'w' from 0-1378.5 / change in 't' from 0-1.01s isn't right.
Please help.
 
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The listed answer makes no sense. Are you stating the problem completely?
 
angular acceleration problem

Thanks for responding. I found this problem on a site for practice problems (link listed below). I copied and pasted the question and answer directly from the page. I am confused.


www.dctech.com
 
I went to that site and looked at 3 problems. Only one gave the correct answer; two, gave goofy answers, just like the problem you presented. Forget it. (You may wish to complain to the site owners.)
 

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